Most likely answer is that they do it for the same reason as Facebook not sorting their feed by date: they want users to fully rely on their algorithm. My completely uneducated guess is that they want to feed their users older videos where they don’t pay out as much to their creators as they do for new videos.
I don’t live in the US, so my views are probably biased by our anti-Trump media hype, so even though I agree with most of your points, I’d leave two open for discussion:
I was under the impression that Republicans are not looking for love from women, but their total subjugation. Women don’t need to love them (perhaps they can, only in Stockholm syndrome mode), but they have to obey. I don’t think incels will be disappointed.
I said this twice before, and I was always wrong, so take this with a huge boulder of sand. But I don’t think he’ll last four years (unless they do a Weekend at Bernies), so part of the 4 years will be with that weird cross-dresser, and I have absolutely no idea what to expect from him.