Websites can move to more efficient and lighter methods of delivery to cover the absence of advertising revenue. Anyone skilled who works in the advertising industry is freed to offer his skills to better human endeavours. Everyone wins.
I don't want to be rude, but won't they just end up losing their livelihoods? If the advertising industry goes, most programmers will see their salaries drop hugely. Even those not working in advertising will see a drop due to the flood of supply.
(I do think advertising is net positive and prohibiting it would be a bad idea: https://www.jefftk.com/p/effect-of-advertising)
Consumer habits will just become more unpredictable- and small companies could compete with big companies that spend billions on marketing.
Even if you were not directly influenced by advertising, you probably were indirectly through word of mouth.
With harmful incentives removed, this would encourage websites to focus on good writing and less on being 'content farms' to drive up engagement for the advertisers.
All I want from most sites is the text. Not adverts, trackers and those damnable autoplaying videos that jump out and follow me down the page. I use the reader mode in most cases. Why is it necessary to use reader mode if not to cut the useless cruft? Why can't the web just be like that?