From the beginning the web has been about cutting out middlemen. Sure, everyone still pays for the bytes, but consider how much less it costs, per-viewer, to distribute a paragraph on the web versus printed on paper.
Want to communicate quickly and cheaply, without paying for stamps or surcharges for expedited delivery? E-mail.
Can't find a publisher willing to take a golden-master and create thousands of CD-ROMs? Sell your own software online.
> This sounds sober and serious, but it omits one crucial clause: the people who create free online content expect to get paid.
The real issue is that there are middlemen who promise "I will convert your consumer-visits to cash" that also expect to be paid. Many happen to be ad-networks, and the profit motive (both from producers and middlemen) has led towards practices that harm consumers and (indirectly, long-term) the producers.
Privacy invaded, malware distributed, computers slowed, load-times skyrocketing, etc. Absent a reaction from producers or consumers, the most-ruthless ad-schemes tend to rake the most profit, so it becomes a race-to-the-bottom.
In this sense, consumer-driven ad-blocking is ecologically-necessary to make that "Visitors-To-Cash" industry refocus on other mechanisms and better ways of interacting with their two main stakeholder groups. In a very broad sense, it's their job to find a better solution.