It’s their intellectual property, so obtaining copies against their will is theft.

So do you think YouTube videos aren't intellectual property or do you think that streaming is excluded from "obtaining copies"? I didn't "obtain a copy" of the new Spider-Man movie when I streamed it from some random website. Did that not count as me pirating it?

How do you feel about using VPNs to bypass region locks on something such as Netflix? Do you believe that counts as piracy since "their will" is for you to not watch content that isn't available in your region?

This is all ignoring the fact that "[YouTube's] will" is that you watch an ad in order to watch the video, so by blocking said ad you are obtaining the video against their will.

It's also ignoring the fact that one of the largest selling points for premium is that it removes ads and pays creators for your views. That right there makes your entire view incredibly stupid. Don't want ads? Buy premium.

Lost profits are literally the basis for copyright infringement and piracy. Refusing to watch a video is not the same as watching it without paying. If you watch a video in a manner that results in them not getting paid when they should have been, that is theft. Either you know this and are trolling or you're literally under the age of 16.

I also seriously question where your morals are that you don't believe creators getting paid for their content is a "moral obligation".