I don't get why there's not continuous validation from apple for UX. Can't they just pay random users to do some tasks and continuously monitor whether they are

I don't get why there's not continuous validation from apple for UX. Can't they just pay random users to do some tasks and continuously monitor whether they are able to do it? Something like: how satisfied are you with x,y,z and then let them try to do task 1, task 2, task 3. Just track these metrics and try to improve the UI according to this. It seems like the designers just live in a bubble without feedback from the users, this seems especially crucial during and after a redesign. Maybe a small popup in apples own apps, like music. Something like: Want to use apple music for free for one month? Just answer these short questions and complete a few tasks! These things don't need to take longer than 10 minutes. Even a small sample size could provide meaningful and statistically significant results.