I deliberately named defenders who had never gone forward to highlight my point they are not just "failed forwards".
As far as your question I am not sure jb, but I believe there is such a thing as a natural defender and I am a big believer in a strong defence being integral to a strong offence.
I don't see defenders as lesser players, I have a high appreciation for the good ones and my only point was they should be recognised along with the easy/sexy options (ie high possession getting midfielders, forwards who kick bags etc)
To a lesser degree rucks are in a similar boat, but not as bad. Defenders get the short end of the stick in my view and I find it dissapointing.