The win for mastodon is that it's a choice to view those feeds at all. Some have none by default (e.g. librem.one), you only see who you follow. Same with bluesky. "Discover" is there by default, but can be removed. It's a tad annoying in some places, like when your feed is "empty", they still show it at the bottom, but it's a big banner which, for me, is a perfect indicator to stop scrolling. You can also hide "Trending Tooics".