You raise a good point here. You and I can do some back of an envelope numbers, but beyond that we'll never really know.

It made me wonder, do Cloudflare know? We could ask, but they'd be an unreliable source.

And what percentage of legitimately blocked web requests is "acceptable". For me it's zero, so long as one of those requests might be a person seeking life-saving information, which is the kind of critical infrastructure the Internet has become.