Like it or not the platform is full of people trying to make a living independently producing content. Most of them are not making very much money. Watching with an adblocker means they aren’t earning any revenue, which is unsustainable. Watching with a Premium subscription means I don’t see ads and they get more revenue (even more so than ad-supported views).
Those people aren’t massive corporations. They’re independent creators. And generally speaking the content I watch on YouTube is content I want to support.
I’m not trying to say it’s like, inherently ethically wrong to watch YouTube without ads or Premium. But it certainly isn’t ethically superior.