I'm not sure if this is a rhetorical question or not...
I will say the fact that this is a news story implies to me that this is unexpected behavior from Valve. We are all used to their milquetoast responses to this type of thing. So good on them for changing, at least in this case.
I think it's also the fact that all tech companies - Twitter, Facebook, Valve, YouTube/Google - are being called-out on their reckless/apathetic attitude to hate in response to the New Zealand attack. This should be the first step to companies both taking responsibility, and being forced to take responsibilty for the rise of extremist white nationalism on the internet.