Most roles in the military require ad hoc applications of brute strength to do the job competently even if it isn't per se part of the job description. This includes things like operating vehicles, desk jobs, etc.

In the military context, almost every job must be performed in the field or in the absence of (working) machinery. You still must be capable of carrying the equipment load-out for your role on your back. The inability of women as a class to do this effectively has been a longstanding issue. Everyone is at risk of being thrust into combat situations due to circumstances beyond anyone's control. The "rear echelon" can suddenly find themselves no longer in the rear.

All of which is separate from the question of the use of conscription generally.

In the US there is a separate gender-agnostic authority that allows the US to impress someone into non-military service for (IIRC) 6 months.