No ad blocking is going to get rid of that though, until you run something analyzing the actual video/audio content and not just the source of streams or how they're loaded.
SponsorBlock doesn't detect sponsored segments. Users mark the segments and submit them to a database.
If Google did try to automate it, you can be sure that people would just move to integrating the sponsorship into the content. Those are the worst kind of videos and I don't want to encourage more of them.