Ohh really lets put credibility with logic and reason shall we and just say that you should be fit for your role. No doubt Genghis Khan was a fit %&^$er but he lead from the front and was probably a decade or two younger. Different times. If you have to go out and walk 20klm in full kit then you had better be fit enough to do it. If you have to go out hack rack and zoom then you had better be fit enough to do it.