I think they said that they they technically don’t block ads. They just don’t implement them. If youtube were to somehow pack ads into the video stream, they wouldn’t go around it. Though I’m sure that in such case an adblock extension would pop up very fast.
You are not wrong. But this isn’t even like proton, it’s not for end users. It’s intended for developer testing, so they can get an idea how well it runs on a mac, and then somehow be persuaded to do a proper mac port??
There was a thing about this from the finnish public broadcasting company a while ago. Their results were similar.