Sources on any of this? Perhaps it works differently on Android.
The main thing which you miss though is that it has “the algorithm” down pat. While it knows I’ll watch cooking videos and videos of people yelling at cops, it doesn’t bother trying to show me things about Trump, etc. it is keeping me in my own custom echo chamber. I have no idea how it works so well.
Now imagine someone hell bent on believing things like the pizza molester stories or Jan 6th alt histories. This is a very effective tool for radicalizing people and reinforcing the “truth” they already suspect. It’s easier to divide people based on preconceived notions than trying to convince people of something new.