I won’t argue that, its a flawed measurement system. My goal isn’t to show you why imperial is so much better than metric, because its obviously not. That doesn’t mean imperial is never useful though.
There’s nothing „more useful“ about either a foot or a meter.
They can both do the same job, but its more convenient to have smaller units depending on what you’re measuring. I find the size of a foot to be convenient for measuring things in casual situations where accuracy and precision aren’t priorities.
Your foot btw most likely is not as long as a „foot“, and a small woman’s size is easily 20% off. And no, that’s not „in the ballpark“.
We don’t literally measure it with our feet, that’s just what its called.