Then, the ad-adverse users will just use software that downloads the video and reprocesses the file to remove the ads. Ytdlp already does this with SponserBlock integration, and I imagine detecting ads is something AI would be pretty good at.

Of course, you lose the ability to mindlessly browse YT with no ads or get the dopamine hit of clicking an interesting video. I'm sure that's something YT considered if they pushed this option. They don't want you to just watch the few vids from your subscriptions per day and close the app.