You may or may not be right but it’s still very beneficial to install a custom rom or disable as many privacy invasive settings as possible because it will definitely at least significantly limit the amount of data google gets and its definitely better than giving up and doing nothing.
I honestly believe that Google doesn’t have any back-door into your device anyway.
If this is nsfw then I wonder what the australian tac ads count as. (Literally showing people getting hit buy cars and flung up into there to there death)