Weird, the porn seems to be PERFECTLY censored and the ads are laser-targeted. Google is a world leader in ML and AI. You really think this is so difficult for them?
You clearly don't work in ads, we don't manage to have ads that render 100% of the time. Everyone thinks we have super awesome targeting that tracks your every move but most of that is marketing bullshit from people are trying to work for advertisers. Here's a huge amount are targeted do are you in this area, are you in the 18-24 male demo, and did you visit website XYZ in the past 30 days.
We have different YouTube probably. I can easily search and find fetish porn videos. The fact that we don't see it recommended videos doesn't mean it not exists.