[MENTION=6880599]ClaytonCross[/MENTION] reply w/o a quote for obvious reasons 
Nah joking aside, you made a lot of good points and analysis but on some things I disagree:
Those players who do not min max, in a campaign which is not purely hack and slash (and even then sometimes) have other advantages you just forgot.
A minmaxer has 1 or more very weak stats that is the min side of the medal which is all to often forgotten.
The roleplayer with odd stat or not, might have some points in wisdom or charisma and is much more likely to resist a charm.
Just imagine your minmaxer in a campaign with lots of vampires. Those mobs are hard enough on there own, but if your minmaxer is dishing out the tpk alone,
just because he gets charmed every other time and the dm plays it closely by the book, guess who has the fun at the table: right, the dm if he has some slight sadistic ambition.
There should be some kind of social contract on these things. Most people are capable of doing both, balanced builds and minmax builds.
The campaign gets much better and is easier to design for the DM if all players build their character to the same guidelines:
Either everyone gets a decent chance to resist the charm because of good social skill stats or the one able to dispel the charm on the killer is very good at resisting said charm.
You got mundane combats a lot: DM just scale the whole thing down or up, depending whether the group is minmax or average. That is much easier than doing the split the challenge tactic all the time.

Nah joking aside, you made a lot of good points and analysis but on some things I disagree:
Those players who do not min max, in a campaign which is not purely hack and slash (and even then sometimes) have other advantages you just forgot.
A minmaxer has 1 or more very weak stats that is the min side of the medal which is all to often forgotten.
The roleplayer with odd stat or not, might have some points in wisdom or charisma and is much more likely to resist a charm.
Just imagine your minmaxer in a campaign with lots of vampires. Those mobs are hard enough on there own, but if your minmaxer is dishing out the tpk alone,
just because he gets charmed every other time and the dm plays it closely by the book, guess who has the fun at the table: right, the dm if he has some slight sadistic ambition.
There should be some kind of social contract on these things. Most people are capable of doing both, balanced builds and minmax builds.
The campaign gets much better and is easier to design for the DM if all players build their character to the same guidelines:
Either everyone gets a decent chance to resist the charm because of good social skill stats or the one able to dispel the charm on the killer is very good at resisting said charm.
You got mundane combats a lot: DM just scale the whole thing down or up, depending whether the group is minmax or average. That is much easier than doing the split the challenge tactic all the time.