I'd like Google Ads and their ilk implement a feature where people who never click on ads and don't want to see them could opt out, so that the ad service won't waste time and impressions on them. (Ideally ads would be opt-in instead of opt-out, but who am I kidding?)
Advertisers still probably wouldn't go for this, since they do get some awareness benefit from showing ads even to people who will never click on them. And besides, the feature might also be used by people who hate ads but click on them anyway. (There must be some people like that.) Might as well stick with client-side ad removal.
