> Cloudflare is shrewdly calculating that there is a lot of latent, unexpressed hate toward patent trolls but that most people don't want to make a career out of it, but might very well make a little hobby out of it, and so they get to take advantage of people who are motivated by something other than money.

I don't think this is a good strategy. These folks tend to have a poor understanding of patent law in my experience, and you need to understand the basics to do this right. (You fortunately don't need to know too much law to handle 90% of cases.) And these folks probably aren't very effective at patent searching even if they understand the legal parts. I think most people overestimate their own search abilities. I certainly did. Examining patents didn't level me up as much as humble me in that regard.

> More deeply, the very idea of a "patent examiner" has never made sense to me. It require being expert in all things, which is impossible. [...]

As saratogacx pointed out, at the USPTO, the vast majority of examiners have a specific technology they are assigned to. While the matching of examiners to their "art unit" is often pretty bad (I could go on a rant...), the situation is not as bad as you described. There are some generalist examiners, but as I understand it, they are in (basically) QA roles and don't need to know the technologies as much. Unfortunately, USPTO upper management seems to want to make examiners into generalists, which I doubt will work out as they want.

I agree that periodic rotations of industry folks into patent examiner positions is a great idea. It would help the patent system and give the industry folks some appreciation for what examiners do.

If you're worried about lack of expertise, you should be more worried about the courts. Judges and juries almost never have a background in the technology of the case they are working on.