Parker accepts his role isn't the most glamourous.
"No, it's not glamourous but it is important," he said.
"It lets Steven Gerrard play and dictate things and that's what it's about. How you win games is immaterial. Yes, some people don't like it - I can see you don't - but, hey, that's the way it goes.
"When the end result is being through to the next round, you're not fussed how you do it."