What would disprove it is if people would quit upvoting, reading, and watching things that make them more and more angry. Algorithms don't steer anyone. People steer themselves with the algorithms. They're essentially mirrors of one's personality. Just be aware if you upvote a post that says "Tech billionaire kills baby seals with his bare hands, has sex with the corpses, and laughs about it on TikTok", you're going to get more stuff that has all those keywords in it. However, if you upvote "How do I subdivide a mesh in Blender?" you will get a bunch of stuff about Blender, subdividing 3D models, and other topics related to that.