There was one little thing about this whole situation that he needed to do even if he didn't want to… he needed to push away everything he feels or not, push away his perception and understanding of life and death, on the understanding of everything… and became somebody who he is not.
He needed to be somebody who knows how to apologize, who understands the bad about the situation and regrets his choices.
Yeah, he needed to act, to be a great actor even if it would be obvious, but he needed to change a bit, he needed to show a side that he was back at his childhood, and the reason for it was simple, yet so complicated.
The mafia is a palace that's just filled with people from the past that is terrifying, it's filled with people who kill without thinking, who kill without any regret, just like him… but the thing is he knew that his mafia, the Cassian family that Pablo built up over the years, are not like that.