STR adds to melee hit and damage. DEX adds to initiative, AC and to hit for ranged attack. Those are two equally useful abilities. An archer archetype needs additional STR as much as the tank archetype needs DEX; it's nice, but not missed when lacking.
Not quite. Melee fighters typically wear heaver armor than archers, so their bonus to AC from dex is going to be limited (probably to only +1 or +2). Thus limiting their benefits from a high dex.
Archers benefit from up to an 18 str (vs dex 12-14 for a tank) and can benefit from as high a dex as they can get. Their strength bonus is one of the few damage bonuses they get that works beyond 30', until GMW starts kicking in.
Also the tanks can concentrate on maxing one stat with level advancement and bonus items, since a single stat will bump both to hit and damage. With an archer you have to split your efforts between 2 stats or at a minimum require twice as many buffs.
It's not really a question of whether or not anyone cares, but more a question of whether or not your reason has any plausibility.
For kreynolds
Rackhir's Standard Answer to Why Bow and Arrow Bonus Stacking is Not a Munchkin thing (c)
Yes, the ability to stack the damage and to hit bonuses is a nice feature, but let's look at some of the things you give up or can't do in exchange for that.
1) Numerous feat and prestige class skills that do NOT apply and do not have any counterparts in applicable Missile feats.
Lets look at one in particular for a moment, Power attack.
I have a 12th level archer character. Has a buffed attack bonus of 22/22/17/12. So basically he does not miss against most oponents (say AC 20) except on an automatic miss. A melee character with Power Attack (one of THE basic feats for any melee combat characters) can convert that excess attack bonus into damage with Power Attack. That can easily translate into another 5 points of damage per hit or more depending on how lucky you are feeling. I have pretty much stopped looking for ways to increase his attack bonus as a result and are scrounging for ways to increase his damage. There aren't a lot out there.
Whirlwind attack, Cleave/Great Cleave, Combat Reflexes (multiple AoOs) all do not work with missile weapons and have no counterpart in feats for missile weapons (though there is one feat for Arcane Archers that gives an attack against multiple opponents). There are many, many more.
Spring Attack grants immunity to AoOs while doing the move-attack-move combo. Shot on the Run does not.
Missile weapons do not threaten an area. This means numerous feats involving AoOs are useless since you don't threaten opponents.
Unless you are an Order of the Bow Initiate, you draw an AoO whenever you fire the bow with in the threat range of an enemy.
2) Strength bonuses cap out at +4 on Mighty Composite bows and it is an expensive feature to add (about +100 gp per +1) . For melee weapons there is no cap and a "poor" Two-handed-sword user gets a x1.5 Str bonus multiplier irregardless of how much he spent on his sword. On a 12th level character you could easily see a strength of up to about 30 when fully buffed (22 str, barbarian raging with bulls strength on), for a two handed weapon str damage bonus of +15. Remember that they are also getting a +10 to hit out of that stat , unlike with an archer who requires a second high score (dex) to get bonuses to hit.
3) Many of the bonuses to hit and damage for missile weapons do not apply at ranges greater than 30'. By some strange coincidence, this is also a standard move for most creatures. In other words, an archer at optimal range is always going to be within attack range of most creatures.
4) Rate of fire - When my archer is hasted he's getting 5 attacks a round. That means he can empty a single casting of GMW (50 arrows) in 10 rounds of combat (or in other words 1 to 2 combats). Melee weapons don't run out of ammunition.
5) Feats required - If you want to have a character who is decent at being an archer, you need a minimum of about 3 feats - Precise Shot, Point blank Shot, Rapid Shot. No problem if you are a fighter, if you're a paladin, ranger, barbarian. You've got some tough choices.
6) Melee types get their own bonus stacking. Namely Shield and Armor bonuses. How come you never hear anyone complaining about this? Especially since a much wider range of classes can benefit from this advantage than from the bow and arrow bonus stacking. Archer types are also unlikely to be able to benefit from this since it's hard to use a large shield with a long bow.
I could go on, for example there are a number of prestige classes which are either useless (melee oriented abilities) or effectively can't be taken by archery oriented characters.
Remember buffing the bow and the arrows is two 3rd level spells a day (out of maybe 5-6) and if you don't have the mage or cleric (or couldn't talk them into casting it for you that day) you are helpless against DR creatures.
Like Zad said, NONE of this is intended to imply or suggest that Archers are nerfed, useless or ineffective. Put together at all well, they are extremely effective, but you do pay a price and there are some serious limitations you have to live with if you are an archer. One further note, none of my points take into account the Epic Level Handbook or related stuff. Epic level stuff is a whole new ball of wax for both types.