the problem is massive ads, 3 line stories turning into multi page ad fests, "Around the Web" type crap, security risks injected via ad networks, etc...
It's not the ads per-se: it's the MASSIVE abuse of ads. it's why we can't have nice things.
Same can be said of TV shows and how it went from a minute of ads... t0o 10 minutes out of a 30 minute slot being ads.
I'm also fine with some advertising, but auto-playing video with sound is where I draw the line (especially when bandwidth sensitive).
If those guys could stay in the sane bounds, the problem would be much less. But right now it's completely out of hand, browsing without adblocker became a nightmare.
Efficiency is a primary feature of uBlock Origin, it's not going anywhere, regardless of whether it blocks tracking or ads, or whatever else.
Just pick your filter lists according to what you want to achieve.
In any case, I fail to see the difference between ads and tracking, as I have often mentioned, ads are just the visible tip of the tracking/profiling iceberg.
I agree for most ads as they are implemented now but things like the common audible.com mentions in YouTube videos I'm totally fine with, that's how advertising was done for decades before the internet and there's no reason it can't still be done. Web page standards give too much power to the page author by default, if the things they use to track people had never been allowed by default, we never would have had this problem because no sane person would agree to them if asked.