can't help but wonder how well some of the commentors would have handled this situation in the early days of their high performance jet careers.
In the 'early days' of my jet career I wouldn't have dreamed of climbing without the other pilot on the flight deck....... but perhaps that's just me.
I've done it just once in nearly 20 years in QF. I was in command two-ish years so perhaps 16+ years experience. Never again after that time. Realised after the first little bit of the climb that I was widening the risk margins significantly for nil significant benefit to me or others.