Not that mature. LOL. To simply sit deeper? A coach would normally be the one to instruct them to sit deeper..... And all they would do is walk deeper down the field.. Not much experience needed there.
The real trick is the decision-making that you are now sitting deep and open to lots of chaos that the coach cant hug you through, like when to step up and cut down all the space and what not. Thats were they can get burned...
LOL MLS professional soccer players cant figure out how to play deeper against an opponent that would beat them for speed and cleverness on through/lofted balls. common man.