Many people are politically disinterested even to the point of not bothering to vote. And like you said, even those that are engaged are still not qualified to comment on the more complicated issues, of which there is a growing amount.

It's an odd contrast with the perception that everything has become hyper-political, intersectional and everyone is an activist now.

Obama once had an insightful remark about it. Sending a mean tweet is not activism. Political activism means reading legislation, learning how the political system works, learning law, and doing a huge amount of work on the ground. It's a lot of work, often unrewarding.

Hence the Tweet. Zero effort. Immediate reward. Nothing changes.