gismo
Touchdown! Greaser!
While the rating itself is of dubious benefit to Ben at this point in his flying career, the training for it will likely bring Ben closer to being able to "handle a plane as well as he handles a cello". And despite opinions here to the contrary I see no disadvantage to taking the checkride if he does the training. If and when Ben gets to the point where a commercial certificate is needed I think he'd regret having to train twice and wonder why anyone talked him into forgoing the checkride the first time around.Glider would be 100x's the benefit to Ben as CP at this point. Ben doesn't need CP until he's ready for CFI and that won't be until he knows flying like music and can handle a plane as well as he handles a cello.
Certainly there are other training venues that might be as or more beneficial now such as a glider rating or upset training but neither of those are a significantly better choice unless Ben has a particular interest in them.