I'm not saying nobody should learn it, I'm saying it's not a great use of school resources. If you appreciate the aesthetic or functionality, then by all means go out and learn it. I personally like them, but I think that it should remain out of the curriculum for purely practical reasons.
I still don't really see any useful skills that learning an analog clock teaches you, besides how to read an analog clock, which isn't useful because analog clocks are so rare IRL.
The handful of useful skills they assist teaching isn't worth it because there are better ways to teach those things. The clock isn't so good at teaching all those things that it's worth using the clock instead.
It's not useless.
It's just less useful that other things that should be taught in school. There is only so much time in a school year, and it shouldn't replace those more useful things in the curriculum.