I'm not sure that he really cares if he's helping the situation or not, seeing as he's no longer employed there.
I know first-hand that when a team is working on things, and it's very publicly going wrong, and it's due to things that are out of your control, it's beyond frustrating to have everyone think that it IS your fault due to the public stance.
I'm guessing that the Reddit team that is dealing with this is more than a bit pissed that they can't be more public with what the real reasons are.
Personally, I could care less about the "professionalism" or political BS, I'd rather know the real reasons for the problems so that I could be better informed and not run into the same issues.
On the other hand:
"Blaming a third party lacks class. The Reddit guys made the decision to rely heavily on EBS, and it came back to bite them. They show a lot of character by taking responsibility for an outage they had very little control over."
What do you think is the best solution to that one?
Well, at this point, perhaps it needed to be said.
Reddit isn't vital to anyone's well being, but it is a service that hundreds of thousands (?) use pretty regularly, so it certainly isn't trivial either.
How is he hurting the situation by calling out a service for what it really is?
Actually, as a former employee, he is in a pretty good position to criticise while keeping that criticism at arms-length from Reddit. Not a bad tactic.
And it is pretty unprofessional. Ketralnis thinks he's defending his buddies but he isn't really helping the situation.