You know, just because I might roll up a str based fighter and (probably) don't add as many +s at range as I do in melee, doesn't mean I'm not allowed to use a bow. Or invest in those ranged feats. Or use magic bows.
See, I'm a FIGHTER. My job is to FIGHT. Sometimes that means doing so at range....
And why in the 9 hells would I tank my Dex? Even if it's not adding to my AC when I'm wearing heavy armor (wich isn't 24/7 btw as I'm not a turtle or something), it IS adding to my initiative.
What Zardnar said. Also, what you said is my point. Because a dex fighter can
easily tank his strength, and pay very little penalty for it. The reverse is
not true.
A Strength fighter
could use a bow--he wouldn't be very effective with it, but he doesn't really have any other options. A dex fighter
could use a greatsword, but he wouldn't be very effective with it, but he does have other options.
Even with point buy, a dex fighter can easily spread his points around, to be good at the social and exploration game by having decent intelligence and charisma, while losing nothing in combat (or just max out Constitution and Wisdom to completely dominate), while a strength fighter actually loses effectiveness at his main skill in order to have a few extra points in Int or Charisma.
ADDENDUM: When I get to play, I usually play standard human, exactly because I like all those pretty numbers and having bonuses at lots of different things. So I've usually got a 14 in my Dexterity even when I'm playing a Strength focussed character. But I also know that my choice to have that isn't making me a more powerful character, even if it does make me a little more flexible. But that's a choice I've made, and one the costs of that choice is I'll be overshadowed by others at the table who chose to make more focussed characters. And the dex primary guys are often
more flexible than my character while sacrificing almost nothing.