Oh hmm yeah, you're right, I must've mixed it up with another example in my mind. Ah well, replace that with your example in my comment, and the point stands :)
Indeed, I just remembered I actually have a SO answer where a “fake” button is one of the solutions ( https://stackoverflow.com/a/55155649/2444959 ). This question was about having an enabled button inside a disabled fieldset.
I actually do think that use cases are rare, and when you need a fake button, there are probably better solutions (in the SO question, the question author probably just wanted <details> and <summary>) but—though rare—these cases do exist.
