In my 37 years to date I am not sure I can recall one single person, I am sure others on here can but I cannot think of 1 person I knew that left the RAF to join the Navy or the Army.
Conversely I can recall quite a few folk I have met that had jumped ship/tank for the more civilised and grown up life that the RAF offer.
For some being cold wet and uncomfortable is a way of life and not something that is only practiced in anticipation of being on Ops.
As someone else said any bloody idiot can be uncomfortable but the Army and the Navy bods in the main do not choose to be uncomfy on these sort of exercises they do so because the brass tell them that's how it is.
The OP should not be internet bitch slapping the RAF for having the cheek to look after the interests of some of it's people, he/she should be bleating to his bosses as to why they are living in ****e when there is no real need to do so.