You're right insofar as they are unhelpful and artificial structures when people hide behind them or use them as an excuse for doing (or not doing) something. Particularly when they know they shouldn't be. Having the "I couldn't because I'm a ..." thing is self-deceptive.
But there is a very real difference between the two groups in terms of how they 'recharge' or 'relax'. I'm an introvert, which is to say that I prefer to spend time on my own to mentally relax. I am perfectly capable of socialising - and need to as much as anyone else - I just need to balance it with alone time.
Socialising to me is exhausting. I need it, I enjoy it, but it is work and it tires me out. Others recharge from the socialising, and in that context it's useful and important information.
But there is a very real difference between the two groups in terms of how they 'recharge' or 'relax'. I'm an introvert, which is to say that I prefer to spend time on my own to mentally relax. I am perfectly capable of socialising - and need to as much as anyone else - I just need to balance it with alone time.
Socialising to me is exhausting. I need it, I enjoy it, but it is work and it tires me out. Others recharge from the socialising, and in that context it's useful and important information.