No, but I understand the rationale. A button click is an input much like typing. Plus, when I want to give a window focus, I'd rather not look for a non-button

No, but I understand the rationale. A button click is an input much like typing. Plus, when I want to give a window focus, I'd rather not look for a non-button to click. But, having clicks work on hover instead of after focus is fine, and simply has a different set of trade offs.