So sad. I don't know if I'd quite be able to follow what Dick wanted me to say there if I was Bruce, but wow this really is a moment of "We are all too completely fucked up right now to function." Bruce's trying to just hold on to his marching orders when people need some emotional sense is pretty tragic.
I don't see how Bruce is in any way wrong in his delivery of the situation, though, in the way he tells Dick what happened to Stephanie. Dick says he pushed everyone away, Bruce tells him that Stephanie is dead and exactly how she died. Don't see any lack of tact in that part. Those are the facts. They make Bruce want to disassociate and focus on practicaal things, they make the healthier Dick need to seriously talk about the big picture.