Yes, creators have paid sections but they are skippable (and note YouTube helps you skip with a little white dot in the UI[1]) and creators have a strong incentive to protect their credibility. They have an ongoing "relationship" with their viewer. Not so for the random companies that get to spam you with unskippable adverts for crypto scams or fat-free yoghurt in the freezer version.
[1]They don't like sponsored segments as they don't get a cut most of the time. They do have a programme for arranging sponsored segments via the platform, in which case they _do_ get a cut. I'm not sure if they still offer the little skip-helper dot in that case... Anyone know?