I would say that it's a lot more complicated than that. I'll skip an essay explaining this for now and give an executive summary.
In order for someone to do the right thing, they mostly need 3 things: 1) to know that the specific thing is right or wrong to begin with (the 'what'), 2) why it's right or wrong, beyond just simple answers, and 3) how to actually do it, when faced with tangible reasons to do the opposite. Those last two are the tricky ones, trickier than you think, which is why they get left out of most moral and education systems, beyond a simple authoritarian imperative ("I/He/It said so.")
And that's not even getting into the fact that these platforms put a terrible amount of resources into making sure that people stay there. They are being expertly manipulated on many levels. I think it would be an error to attribute these people's continued use of these platforms to something fundamental.
https://en.wikipedia.org/wiki/Fundamental_attribution_error