I agree this form of blocking will be less appealing to many, but personally, I wouldn't mind a few moments to just breathe, especially when I'm doing ad heavy things. Instead of blanking the screen I might instead show a screen that says "Is there something better you should be doing?".
At that point I would auto download any videos from my subscriptions so they are controllable locally. Then an AI or integration with an Sponsorblock could skip the adverts.
Host this all in a system similar to plex and it would be quite transparent.