Users with adblockers in the US was at 25% in 2019 with adoption steadily growing over the years, based on a quick google search at least. But even if it was 10% that wouldn't be a "small minority" and provides an explanation for recent efforts from platforms to force adblockers out.
There's also a fair number of people who might not install an adblocker but don't engage with advertising, click through rates are even lower than the number of people who have adblockers installed.
Online ads aren't sustainable, it's a grift prolonged by advertising fraud.
Ordinary people don't complain about ads, don't know that ad blockers even exist, and don't seek out ad-free alternatives.
Ads to them are like water is to fish.