But wallets can be swapped all the time, even moment to moment.
So if you just have throw-away wallets, how do you use that with your content? You cannot "own" your content if you keep having to abandon wallets to get a fresh advertising ID. And if you keep several different compartmentalized wallets around, as soon as you move something from one to the other or use a different wallet with the same login, you have permanently and irredeemably linked those identities.