Yeah. Which is pretty much undefeatable unless they get rid of the ability to skip sections of a video entirely and I don't think there'll be wanting to do that. Sponsor block doesn't exactly block things, it just skips sections of a video that the community has submitted it's not quite the same thing.

Those sections might be intro animations, that bit where they go "hey guys my name is XYZ YouTuber smash that like button and don't forget to subscribe comment and ring that bell!" etc

Ads can be randomly placed so there is no specific timestamp to skip.

This would obviously be very costly for Google, which is likely why they haven’t done it yet, but ultimately an ad blocker wouldn’t be able to block those.