Every time I got better at dancing I got better at juggling too. In my folk psychology, juggling is a partially-attached extension of your hands, so it’s just weird dancing.

If you think of it like 3 jobs you have to do simultaneously everything falls apart. Internalizing the three balls as a single process that you are participating in makes it a lot more manageable.

Of course the only way to get there is some 10s of hours of practice

Yeah I could see that. I think that because dance is so heavily reliant on proprioceptive abilities, it makes sense that there would be some overlap with juggling.