"The X-Factor compensates for such things as, for example, being subject to military discipline, liability for duty at all times, the inability to resign at will, change jobs or negotiate pay, and the danger, turbulence and separation which are part of Service life." (Quoted from an Army website)
So the X-Factor is only partly designed to compensate for the danger and turbulence caused by ops. The Op Allowance and LSA are more specifically targetted towards those in Iraq/Afghanistan. Of course the only people who get the LSA/OA are those who are fit and willing for ops.