Is that completely the case as to why though?
I saw this yesterday and it seems to suggest a variety of things
http://www.ctvolympics.ca/bobsleigh/...sid=51096.html
Edwin van Calker of the Netherlands said Wednesday he has withdrawn his team from the four-man bobsleigh competition at the Whistler Sliding Centre, citing "a lack of confidence."
His coach, Tom de la Hunty, said in a press release his driver made the decision because of "a build up of numerous factors, including his crash in two-man bobsleigh, the tragic accident in men's luge (Nodar Kumaritashvili's death in training) and external family pressures, all of which resulted in Edwin not having confidence in piloting.