I was on my way to get a Ph.D in cell biology but I said f*** it, I don't want to be 35 and still not be able to buy a house, not with post-doc(s) and all that nonsense. So I'm getting a MBA instead.
I think this makes sense. I remember talking to a grad student, who said to me, "**** it, I'm 30 and I'm worrying about a final exam!" Had an impact on me; sad to see all the gray-haired grad students tucked aside in a school building.