Because he's got no brain. He's got no positional discipline, and he needs the team built around him, which is fine for Liverpool, but has been a pain in the arse at international level.
That said, this system we saw last night puts him in a position where he doesn't need to do anything so...
As above really - I'm no big Gerrard fan, but he delivered.
About time we started being ruthless and weeding out the consistent underperformers - goodbye to Lampard, Terry and Rooney, please.