Think about it, Google Maps is (I think) the biggest collection of map data and information on locations everywhere around the world, yet I don’t want an advertising company knowing that I just went to a fast food place.
YouTube is an endless trove of video content that anyone can contribute to, yet I’d much rather not give an advertiser information on every little interest that I have in video.
It’s so bad for you, but it’s so good.
I use Brave browser, and am never logged in to YT (You Tube) because I’ve never even made an account with them, and when I use YT on Brave, after I’m done I wipe the browser history, and then it resets everything. So I have never run into problems with YT trying to suggest me stuff with each ‘new’ initial time I then hop back on YT through Brave browser.