Using an adblocker certainly won't help smaller creators and niche interests. If you don't want ads but want to support creators, pay for Premium.
As I understand it, a chunk of your membership fee is divided amongst all monetized creators you watch on a monthly basis, proportional to your watch time. A different chunk of your membership fee is divided between the creators and record labels, for your watch/listen time of Shorts and Youtube Music.
So the size of the creator is only relevant insofar as it can determine whether the channel is eligible for monetization. View time is not worth a different amount depending on the size of the creator.
Why does that make it okay to use an adblocker?