... Why is it upsetting?

Wrathion's expression pinches in concentration, as he thinks. Does Anduin believe that he doesn't appreciate his concern, or care for it? Does he not trust Wrathion's judgement, in calculating this risk? Or --

"You do not believe I should take risks?" he hazards.

Perhaps that is it? There should be no risks at all? He is not... certain he can keep to that, if that is the case...