|Jiggy RPG Superstar 2015 Top 32, RPG Superstar 2012 Top 32|
And I think society play in the convention atmosphere sort of encourages this. Players just are not motivated in getting to know each other at all, unless you know the game is going to be played at regular intervals, at a table, where you have to look at other people and learn how to play with them.
Actually, I think the vast majority of Organized Play is not at conventions, but at local, recurring, regularly-scheduled Game Days. If you play with any kind of regularity, you start to get seated with some of the same characters repeatedly (hence why some people knew Thomas the Tiefling Hero enough to be excited for me to play him) and can benefit from that knowledge.
For instance, when my Eldritch Knight was seated with a charge-oriented cavalier that I'd seen before at other tables, I prepped an extra slot or two of fly specifically for use on the cavalier's mount if we encountered difficult airborne enemies.
Unless someone only does organized play at conventions, or only plays once in a blue moon, there will be opportunity to learn other people's characters and adapt your strategies for a good payoff. Additionally, some people got rather well-practiced at very concisely and clearly telling the table what they're good at (and eliciting the same information from others) for the specific purpose of fostering teamwork.
Thus, I don't think organized play has all the effects on the playerbase's culture/mindset that folks outside of organized play tend to think it has.