Personally knowing something about many of the clinics that are "en vogue" at most times - knowing players that have been to them (including, sadly the ones that had to retire) - doing research in this area continually - and having met/seen some of the feted super medics - then i'd say a little more about it than your average football fan.
One of the main reasons a player will go abroad is because the procedure was carried out when they were in a different country and its not at all unusual for somebody to remain under the care of the specialist who carried out the procedure - i have already said that it makes sense for players to be treated where they feel comfortable as a huge part of rehabilitation is based on trust and confidence.
But that wasn't the extent of the original question - it was more on the lines of whether we had medical facilities and expertise here - well we do - as good as anywhere - but it became "de rigueur" to send players abroad and there is often no sensible reason to do so other that "its the thing to do". Not a decision based on strong clinical reasoning.
Now, i can go on and give loads of testimony on this from world renowned experts - so yes, it is an area i know quite a bit about - do you want me to apologise for that?
So, rather than be a glib and patronising - why don't you state the case of why i'm wrong?