I already do that if I'm on a device without adblock, by muting the tab and switching to something else.

True, and we do, but broadcast and cable TV have done this for decades, and some current streaming services do this. If an advertiser wants to pay for guaranteed attention, maybe some sort of "click this dot in next 10 seconds" and the ad ends, else it'll play through. The online ad space is a pile. Silly options may work better than the current models.