> I don't understand why people don't have a fundamental right to refuse ad exposure in their private life

This seems a bit of a strawman in this context. You have the right to not visit YouTube.

Likewise, you have the choice in subscribing to a magazine. If you choose to buy the magazine & bring it into your home, it seems odd to ask why you don't have the "right" to an ad free existence in your home.

And, at least, in this context, YouTube does offer an ad-free version, YouTube Premium.