Couple of thoughts. First you sound like YOU picked the classes and not your daughter. My parents never ever picked a class or even commented on it. Also, your thought around what is a useful skill while perhaps even valid seem like a hovering parent to me.
After that’s out of the way, I’d add this. Honesty is very important to us so I would have her pay some portion of that semester for slacking off. Those scores and that approach would mean that our family money was wasted so I would expect something in return.