His criticism isn't about the OP's lack of time at University, it's about his lack of life experience. I mean, the guy's a sophomore at college, after all. It's

His criticism isn't about the OP's lack of time at University, it's about his lack of life experience. I mean, the guy's a sophomore at college, after all. It's not outrageous to suggest that he's a bit naive and/or idealistic. He doesn't need to provide a "backing for the idea" - Holloway's point did that adequately. And for me, personally, reading the counterpoint just convinced me of the validity of Holloway's argument further.