Think that press conference just about summed up why he is going. He is tired, as he has mentioned many times now, of the same questions.
I get why that last question was asked, but still seemed a bit tactless. To paraphrase it, he may as well asked "how can you leave these young kids just as they are starting out?"
It was a bit like asking someone who just needs a break from life, and has to leave their family for a period of time, how can you do this?