I generally agree. I think in some cases though, the instructor gets a little carried away, possibly because they have a hard time getting back down to a really basic level or maybe they just want to show off. (And, agreed, then they should not be teaching at that level.) Or maybe the group skill levels are just too spread out and they can't keep everybody happy. IME, some places emphasize choreography, even in supposedly lower level classes. The problem is that the choreo can be too complicated for many in the class to pick up, especially the leads. I had experiences where I flat out told a rotation partner that I was lost, but I'd try to stumble through. A ploy to sucker people into privates? Dunno.