> Do you think it's socially acceptable to ignore everything that doesn't affect you personally?

Yes, yes, and yes again.

> Many activists would certainly have you think otherwise. As far as I can tell, fighting that habit is a huge goal of activism.

That's their problem. As soon as you start contributing to them, you will not pursue your own goals, living your own life, but those imposed by activists or their supervisors.

It's convenient for them, you give them a political resource. But why do you need it?