Google already does this with YT; YouTube Premium[1] offers you YT experience without ads plus extra perks. And YouTube Premium has apparently more than 25 million subscribers in US alone[2] and 80 million subscribers globally[3]. My thinking is power users are ready to pay for ad-free experience and casual users probably not because they are not heavy users.
>But that's just me - I actually like to know who is advertising for particular searches. A company with an ad budget to rank at the top of ads is probably more trustworthy than an anonymous website.
A lot of spammers and fraudsters see advertising as their most effective gateway and tactic to scamming people so I wouldn't count on reliability and safety of all ads that you see.
[1] https://www.youtube.com/premium
[2] https://www.statista.com/statistics/1261865/youtube-premium-...
[3] https://blog.youtube/news-and-events/youtube-music-premium-8...