100% agree with this. I'm a huge proponent of support in the industry/past time and I HATE that artists keep the craft so closely guarded and never actually help each other. Newbies and people I show my work to are often like 'oh I could NEVER do that' and I'm like 'yes you can! talent is only affinity - you dont see the hours of work and many failures that go into something like this'.
So that's one angle of it - the mystique of art. We should be making this whole thing more accessible to other artists and curious beginners (gatekeeping is a whole nother subject that I won't get into lol).
But on the 'people' side, I loathe those throwaway 'oh we should do an art trade'/'hang out sometime'/'talk art' lines that people say for no reason. If I promise an art trade, a message back, a 'check out your comic, it's going straight on my Evernote and it'll take some real extenuating circumstances to stop me. There's no excuse for flaking on a commitment you've made to someone - however small. This is in no way a brag but honestly, I've got a lot of tabs open from my traditional artists thread because I said I'd check 'em out - and I will, even though it'll take some time. Everytime we ignore a fan or make a pithy promise, we damage our integrity and of artists in general.
Anyway, rant over - I don't think introversion has a lot to do with it anymore. After I get home from work I lock myself in my room pretty much, but hell if I'm not gonna respond to someone. People are getting more selfish nowadays. The solution to this thing is to just keep on being awesome and genuine and be the change you want to see in the industry - if people are gonna be awkward about things, personal choices aside, then good luck to 'em.