I had the same reaction. Has he not noticed goalies playing at the top of the crease (still)? Goalies play from the standing position for as long as the can to leverage their quickness, only dropping to the butterfly when the shot is on its way or a defensive breakdown demands it. I was really surprised to see who wrote it.
When he talked about goalies not ever needing to get off the knees, I was wondering what teams he was watching, because it wasn't the same teams as me. Goalies only drop to their knees when a player shoots. I'd be yelling at the screen if my goalie just sat on his knees. I don't know where that claim comes from.