What is not professional about wearing the club sporting attire? What about assistants and the other coaches then? Should Tony Parkes have to wear a club suit aswell? It's just bollocks mate I'm sorry.
There is more than one way to skin a cat and there is more than one way to be a football manager (and as Tim said, more than one way to win football matches).
As soon as a bloke stands up there in a club tracksuit with a normal accent and plays 442 people just can't take him seriously because he hasn't come from some exotic European location, doesn't play the trendy 451/433 and doesn't spout inflated bullshit to the press as if every comment is a grand insight into the game of football. People find it all to simplistic. People like to think football is this grand and complicated game and can't be simplified by a man from Borehamwood. It's the very same reason Harry Redknapp wasn't given the England's manager job.
I am not against foreign managers, managers wearing suits, or managers playing the 451/433 formation - but I do not buy into the snobbery that persists right up to the highest level in English football at the moment that stops talented managers getting their chances because their face doesn't fit the brand image and profile.
As I am writing this I am watching Chris Hughton on MOTD come across as a totally bland and uninspiring robot in his club suit and tie. All very professional, prim and proper - but not the kind of bloke I'd want in the dressing room to gee up the players before a big game at Old Trafford.