I see people asking similar questions since the beginning of Stack Exchange, for different reasons.
What I think, especially after the latest events, seeing up and downvotes as a way to agree or disagree with someone anonymously: it made sense at the beginning, when it was about technical questions, but MSE is more like a social network, with lots of issues being discussed, and a lot of people pouring their emotion into their posts. Some can feel endorsed by a high number of upvotes, and think they are winning an argument because of the sheer number of supporters. That's not how a civil discussion should work, IMHO. I think this hampers inclusion, because users whose opinions are different from the majority don't feel welcome to participate.
It's not about "useful" vs "not useful", and I am not suggesting to remove the possibility of upvoting or downvoting. What bothers me today is that every question and answer has a big number of "likes", and that's the first thing I see. The signature on each answer has a name, a number of medals and a score. It's ok when you share some information and get feedback, not if you try to contribute your point of view on a particular subject.
This kind of gamification works well for technical Q&A sites (mostly), but I don't find it appropriate for general discussions like here in MSE. It keeps people from posting their opinion and risk becoming a downvote magnet, because upvoting someone else is cheaper.