I'm not sure about the allegations, but this certainly does not match my experience -- I have seen an incredibly diverse set of people in my FYP feed.
(I wish YouTube had content discovery like TikTok -- YouTube seems to always want to steer me to either something that's an exact clone of the last thing I watched, or something that's just dumb and super-popular. TikTok is amazing at ferreting out all kinds of veins of interest. It's great.)
I don't know if TikTok has a better discovery algorithm - I think its just able to feed you with more videos in a set of time. A 1 minute average video time lets you recommend 10 times more videos than a platform with a 10 minute average video.
(I wish YouTube had content discovery like TikTok -- YouTube seems to always want to steer me to either something that's an exact clone of the last thing I watched, or something that's just dumb and super-popular. TikTok is amazing at ferreting out all kinds of veins of interest. It's great.)