I doubt YouTube worries about being demonetized by advertisers at this point. Where exactly will this advertisers go to advertise on long form videos otherwise?
They've been the target of that twice at least, in 2017 over hate speech [1], in 2019 over pedos[2]. Large brands spend insane amounts of money on advertising, and they do not want their content to appear next to people facing allegations of sexual misconduct or otherwise bad behavior.
Hell just look at Twitter and how much advertising income they lost in the matter of a few months [4], as brands didn't want their ads to show up next to actual Nazis [3]. And instead of recognizing this and getting rid of the Nazis, Musk wants to sue the ADL [5].
[1] https://www.theverge.com/2017/3/24/15053990/google-youtube-a...
[2] https://www.forbes.com/sites/jilliandonfro/2019/02/21/advert...
[3] https://www.washingtonpost.com/technology/2022/12/06/twitter...
[4] https://www.bbc.com/news/business-66217641
[5] https://www.theguardian.com/technology/2023/sep/05/elon-musk...
It's as simple as the execs at every fortune 500 company with an advertising budget being religious in some form and being shown "here's your Diet Coke ad next to <insert spiderman+elsa/terorrism/podcast debating if hitler was bad>" by someone with an agenda/some journalist' article. Even if they don't really care, it's enough of a reason to go to Google and get a marketing discount for x years.
With platforms like TikTok also being extremely popular, advertisers may simply choose to focus their budgets on these platforms instead of YouTube.