What a steaming load of bollocks.
Even if you play more than just a 'kick around in the park', the level you play at is vastly different to the level professionals play at. If any footballer could adapt to any role, there wouldn't be even nearly as many problems in getting players in for specific roles, and injuries wouldn't matter as you could just replace them with someone else from the squad.
Players have favoured positions that play to their strengths and skills, and to say that any player can play in any position is just rubbish.
And thats bollocks too.
A team pays you thousands of pounds a week, and the manager says to you, being a defender, i want you up front this week. You don't turn round and say I can't because im a defender. You get on with it and you adapt. Morgan could do a decent job winning the ball up front and give it his all, why can't others? it may just be for one game, but the can adapt to a different role?
Or am i imagining things such as geary a defender playing at both full back and as a winger, and armstrong playing left back and then center mid.
Players have favoured places, dosen't mean there the best position for them. the manager picks not them.