How often do you practice uneven lies? How often do you talk about how there's no way to practice them?

We haven't found that to be the case.  There are uneven lies everywhere.  Your backyard.  In the driving range parking lot.  At a local park.

There doesn't have to be a ball on the ground for you to practice how your body should move on uneven lies.  Grab a club.  Or, don't grab a club at all.  Just get out, find a hill, and rotate your body on uneven lies.