I don't think I've ever been as incredulous about a technique's efficacy as I am with ClickFix. Like you look at it through the lens of expertise and it seems preposterous—who would think Win+R for a CAPTCHA is legit?
But it works. Users believe it. It's shockingly effective.
I love users, but the degree to which most of them barely comprehend (and are kind of afraid of) what's going on in the thinking sand can't be overstated.