That's the problem advertising faces; as soon as you encourage people with disposable income to avoid all advertising, the whole system becomes pointless.
It's a massive coordination problem that Brave (and IIRC the Google Contributor project) are attempting to solve.
To encourage revenue, the ads might get more and more obnoxious.
Also, not all advertising targets disposable income. I might see an ad for clothing, which I would need to buy at some point. Maybe I'm underwater on my mortgage and want to learn one weird tip to get refinanced. Plenty of ads out there for that.
A more sinister angle is that there is a type of person who doesn't have a ton of disposable income because he's more susceptible to buying stuff that he sees in ads.
Given the prevalence of ads as a malware/privacy invasion vector, I'm not sure that's true anymore.
Browsing the wider internet without a blocker on is like walking down a bad part of town and sticking yourself with every discarded needle you find.
Sure, the NSA might find out what web sites I've been visiting, but that's a really abstract concept for most people. I don't want to attack your analogy too much, but sticking yourself with discarded needles is a much more tangible risk, and doesn't bring any benefits along with it.
There are some sites I frequent that are egregious about ads, but they provide enough value to me that I keep going back.
Remember that I mentioned malware too - that is a very tangible risk, to my computer and any computer that it's connected to. I'm not speaking hyperbolically here either, malware loaded advertising winds up on large ad networks used on reputable sites[1].
My personal policy remains unchanged: when the site owner takes responsibility for what their server does to my computer (including reimbursement for time and materials when an infection shows up), I'll consider unblocking the ads, and not a moment before.
As it stands, the person who takes that snippet of Javascript from Adsense and ignorantly whacks it into their page wants all of the benefit (ad $$$) with none of the responsibility.
And if you don't offer that option, more and more people will just block your ads for free.