In the same vein as adblocking, the fundamental question here is, does a service have the right to control how you DON'T use their service? Are you legally obligated to be mentally influenced by adverts and cannot close your eyes or look away?

I'd love to see the EFF or similar take on Big (Ad)tech and settle this in court.

They've gone after youtube-dl and lost, Invidious is still there, etc.

A somewhat related legal case from long ago: https://en.wikipedia.org/wiki/Hush-A-Phone_v._United_States