After some major disasters, airline disaster begged the governments to regulate them so that users could trust them again. Otherwise in "free market" there is no way new airlines can be blocked from taking some risks with users' safety for saving a few bucks and thus scare users into avoiding ALL airlines.
Advertisers know there are bad apples in the lot, their own brethren. They don't do anything to protect the user. So they are distrusted. So Adblock.
If they want to get back into users' trust, it is their job to figure out how. But taking a leaf out of airlines' book would at least be considered an attempt to win back trust.
Before you dismiss these as dissimilar cases, think this.
Use of a typical advertisement poses a lot less risk than an airline - chance of computer infection vs dying in a fireball. Discontinuation of the use of an advertisement is also a lot easier than that of an airline - installing adblock once vs travelling 5-10 times slower. The ratio of "ease of avoidance" vs "value" is not very different between airlines and advertisements.