Yeah it's weird, they should also use Leeds as example as go with "if Leeds can win there, why can't Arsenal". All are just dumb points.
People are acting dumb, as simple as that. Arsenal had complete control on the game and were 2-0 up, Liverpool were barely in the game, they struggled to get proper touch on the ball and Arsenal were all over them. Then they made some silly mistakes which changed the game and conceded in the last min of the game. It's 2 points dropped rather than point gained. Result is even bad when you consider how the dynamic of title race has changed.
Before the game, point at Anfield is a good point in any season but not after the start Arsenal had in this game. Context matters.