Respectfully, you're in a bubble and few people really give a shit. Installing an ad-blocker is a ridiculously trivial exercise today, and it's now built-in to several popular browsers, but still 2/3 of internet users are not using one -- about 4 billion people.

Also, how do you scrape videos from YouTube after you "kill it"? YouTube's value is not contained within their web frontend. YouTube is popular because of the network effect they've built by providing massive amounts of free hosting for expensive-to-host content. An LLM does absolutely nothing to undermine that. And, if it ever became a threat to their bottom line, they'd just force users to use a trusted client. They don't bother now because the number of people doing what you're doing rounds to zero.