Users having to log in to a website 12 times a year, or 13 times in a bad year, is a price worth paying to improve privacy and security across the internet.
The 30-day timeout is for Storage Access API - cookies expire much more often already.
As I said, there is an accumulation of productivity harms. My claim is that the pro-privacy solutions are not good enough relative to the problems they cause (and their effect on improving privacy is also debatable).
This is going to affect every user of every website using federated auth. That's a lot of buttonclicking to add to the universe.
Even if I only used a fifth of them once a month, I wouldn't want to re-login 521 times every year. This is a big UX decline for pretty much zero privacy gain.