I personally can't in good conscience pay Google any money when they push initiatives that go against my interests.
Is is theft is you eat dozens of unlimited breadsticks?
Regarding things like breadsticks or chips: you have to pay for either them or the meal itself, they have never been "free". There's not really a thing such as "unlimited", because there are always practical limits. Walking out without paying is also theft.
Buying Youtube Premium is like installing an "official" ad blocking, you are just chucking money into the general Google money pit. You aren't paying for the content, because Google doesn't create it.
Same thing with Spotify, you are just financing Taylor Swift or Joe Rogan.
On youtube or spotify, you are paying in either subscriptions or watching ads to access the content, of which a % goes to the creators. That's the deal the hosts provide in exchange for hosting content & making other content easily discoverable, etc. That's what's violated by adblockers. It is taking something without paying, which is theft.
I am not making a moral judgement on those who use adblockers. But I am tired of the semantic games and pedantry that people pull out to justify theft. Just acknowledge that it's theft and move on!