The choice is not between ads and a hard paywall. This is an area where innovation is possible. Freemium, patronage, there are many possibilities. Can't speak for others but let me pay $10/year or $20/year for slashdot and other sites I frequent and I'll do it.
As for advertising, there are plenty of interstitial advertising channels. With billboards, physical signage on pretty much every surface imaginable, radio/podcasts, a good product will not bear any paucity of customers.
For decades now, ads have consumed my resources and exposed me to nefarious code, some of which is meant to run on or exploit hardcoded structures of my brain. no thanks.