One could also see it as coming from a position of strength rather than weakness.
They don't need the player base, what I'm getting at is that PS4 sold 60m+ that's a lot of players.
It's also the first company that will probably sell 3x 100m+ consoles, with PSP/PS3 being at around 80-86m on top of that.
No other company in the industry has managed that, if they weren't doing well then they might have had a different perspective, but as things stand they might not see the benefit in it.
And I know everyone is up in pitchforks in almost every thread (as they should if they believe in something, they should stand up for it), but it doesn't help to broaden your perspective either as to the why.
No company is going to flat out say "because we don't want to or because we don't see any benefit in it".
Before people start quoting about defending and what's not, I ain't I'm just thinking at all the possible scenario's.