So the reward for signing into YouTube is being able to "reset" by signing out? Because (on desktop) I do all of my youtubing with browsers that have never been

So the reward for signing into YouTube is being able to "reset" by signing out? Because (on desktop) I do all of my youtubing with browsers that have never been logged into any Alphabet service and yet the algorithm has a very clear idea about what to show me. The idea that signing out would somehow give you a pristine neutral state seems quite naive from this perspective.