Though I do entirely agree with the first sentence of your comment. It's the same reason why piracy isn't the dire issue the various media industries make it out to be. The vast majority of people who pirate content, were never going to pay for that content to begin with. So they're not actually losing those sales, because there was never a potential for a sale. I make no claims about this being moral behavior or otherwise, I'm just acknowledging that this is reality.
For the rest of your comment, however, I don't think the driveway analogy holds up. It may be your browser, but it is their content being served via their infrastructure. It costs them real money to create and host this content. Ignoring for a moment that some ads are obnoxious, do you genuinely believe that content creators should lose money for the "privilege" of having you consume their content? Because that seems rather silly to me.
The simple fact is that when you use an ad blocker, you are not just preventing a website from making money off obnoxious ads. You are actually costing the content creator money. Out of their own pocket. The same content creator whom you probably believe deserves money for providing you with that information or entertainment. How can you possibly reconcile these conflicting facts?
Pretending to be making a statement by boycotting all advertisement in an attempt to force the ad industry to change its ways, is no different from the extreme minority of pirates who insist that they are morally justified to never pay for anything, just because they don't like how the music industry operates. Regardless of whether any given industry conducts their business ethically, having a differing moral opinion does not automatically entitle you to everything for free. Or in the cast of ad blockers, entitling you to content at the quantifiable expense of its creator.