Matthew knows it's all bullshit. I can guarantee that he HATES everything that's happening right now, and that he KNOWS dropping Kiwifarms will cause far more problems than it solves.
The problem is that he's not in charge. His company is publicly traded, which means his shareholders are in charge. The board of directors only care about one thing: an increasing profit every year. Anything that potentially threatens that must be dealt with. The problem with shareholders is that they almost always know nothing about how the thing they've invested in works and only think short term. I'm sure Matt spent a great deal of time in meetings trying to explain how this would be a bad idea, but he was ignored and forced to give the bullshit statement he provided.
Nothing else makes sense to me but this explanation. Why take a hardline stance a few days earlier then go back on it entirely? Either he totally abandoned all his principles in a few days, or he was forced.
The lesson here is simple: Be like Valve and stay private, and long term you'll see far more success than you ever would otherwise.