We don't really have all the context of the message. For instance what was the event? (The launch of their first rocket might be classified as an even to Musk

We don't really have all the context of the message. For instance what was the event? (The launch of their first rocket might be classified as an even to Musk for all I know) What was the message that was sent to prompt this reply? I mean he starts with 'That is no excuse' so he is clearly referring to an email sent to him and I am trusting about the general content of the email chain. But for all I know this guy just got up and left work when heard his child was being born as opposed to actually taking time off. While this is a completely invented narrative by me, it could be that it was that kind of action that can leave a lot of other people in the lurch is what there was no excuse for. My point is simply that many people are reading things into the quote which do not seem to be explicitly stated, but are being treated as though they are.