Why? Don't you people enjoy socializing?
You're asking this question of gamers?
Actually, I think most of us enjoy socializing to some extent, just not the corporate way. We're socializing right now, but not in a "tell me personal things about your life so I can privately or openly judge you as I see fit, and therefore help or ruin your career if I so choose" way.
I remember back in the late '90s when I was on the board of directors for the local First Night group. The chairperson decided that First Night would be represented at some political/business community shindig, and told us to "go and schmooze so we'll get donations."
I don't "schmooze" for anything that's not related to something I actually care about promoting. In SF fandom circles, back in the '60s-'90s, it was called "smoffing" ("SMOF" means "Secret Masters/Mistresses of Fandom" and is actually something that means discussing issues related to fandom, usually conventions. When it was decided that NonCon 8 would be held in Red Deer and I was part of the concom, I ended up attending parties I wouldn't normally have gone to. But at least in that case I could just put on a normal costume and help promote having a science fiction convention here and persuade people to buy a membership.
Networking is important, you want to develop relationships with people because you never know when you might need them. Especially colleagues ... it's much easier to get someone's help on something quickly if you're friends.
True. It's sometimes surprising how knowing someone can open a door. I'd never have guessed that having a particular teacher for Grade 12 biology in 1979 would help me get a job in 1993. Not that he put in any word for me; it's just that the interviewer coyly asked if I was a party member (this was for Elections Canada and I was interviewing for a Deputy Returning Officer). She wasn't supposed to ask that, and made a big dramatic show of immediately realizing she wasn't supposed to... but since she had... was I?
I knew better than to say that you couldn't pay me to vote for the party she or the candidate (my former teacher) represented. I just said I'd known him for many years, as he'd been one of my Grade 12 teachers. She beamed when I said that, and figured that
of course that meant I supported him.
It's always been annoying to realize that she cared more for that than the fact that I already had years of experience as an enumerator, DRO, and other polling station positions.