Omegle actively allowed that disease to flourish, and has been for over a decade a mainstream hub for pedophiles. This is not some recent phenomenon. Chaturbate, Snapchat and such services allow the same, allowing pedophilia and bestiality creators. You think that’s by coincidence? The Fediverse platforms you mentioned have nowhere near as many, or even percentage wise in the ballpark of what the forementioned mainstream platforms have. They are dominated by that audience. Abuse of platforms exists, but abuse is never allowed to dominate a significant proportion of userbase. Lemmy, for example, has probably only 15-20 such micro instances that are defederated very well by everyone else.
Are you aware of this, or are just gonna call it slippery slope and end the argument?