Umm I don’t think they care. They have a monopoly on amateur video hosting and only make money off of it with ads. If you are watching without ads or premium then you are costing them money. They do not care about your outrage. This isn’t reddit where it might have caused a long term permanent degradation to their content, the people posting stuff want you to pay or have ads as well. Users do not act as moderators or content providers (I mean I’m sure most content providers are users as well but they want ad revenue). They have just ignored ad blocking for long enough to get monopolies in their areas (browser, YouTube) and are now getting rid of that problem. I’m honestly amazed at how they took over the browser market. Almost everything is chromium based now. Even email. They may not have a monopoly, but they certainly made themselves the standard.

Tldr: they aren’t doing it slow for fear of outrage. They did it slow to get a monopoly.