[nickm12]

For what it's worth, this is a legitimate question to ask and I don't think it means you are a weird, overbearing, helicopter parent for asking it. It's what you would do with the advice that would make you one of those.

As for the answer, I would agree with the others that this is certainly not a "red flag", you can be a successful programmer without being a hobbyist programmer, and you can build a non-programming career on a CS degree. That said, I do find it unusual for a CS undergrad to have no interest in programming outside of coursework. It can be hard to distinguish between "no interest" and "interested in other things" though. It's worth understanding more, but if he's doing well in his classes he very likely knows what he's doing.