When a video says "so check out NordVPN" before returning to gardening content, I don't have any concerns that the gardening content is influenced by the advertising - they're unrelated. This article is about software development and contains an ad which is irrelevant to everything but software development. That's completely different.

That's basically the same way magazine ads work. If the magazine focused on a particular category most of the ads would be focused on that category too.

For example "Chess Life" mostly contains ads that are irrelevant to everything other than chess. "QST", a ham radio magazine, mostly contains ads that are irrelevant outside of ham radio.

This is what I most often see people here suggesting as the right model for internet advertising.