It didn't help that people are seemingly more offended about the possibility of spam on their inbox than on losing a valuable email due to misclassification.

There's little to no incentive for providers to ever de-escalate.

At my day job, we use Gsuite. I never used it for any non-work purpose, and it wasn't publically published, so any "spam" it got was false positives. Emails I actually needed were being buried below the fold in the spam folder. It turns out there is no obvious way to 100% disable spam filtering (at the time I got the first false-positive at least) so I had to try to just allowlist things that should be left alone.