This is very much untrue in terms of being a soldier in a high-functioning military.

Technically, you’re not wrong (at least for lighter weapons). That said, there are many more physically demanding things that are involved in doing infantry things (which is what you’re describing) other than running and pulling a trigger (and ideally hitting the target).

> or do all those technical jobs.

Depends on the job, but much more likely.

The vast majority of the jobs in the military are not infantry or infantry-type jobs, so I can see a lot more scope for drafted women who aren’t cut out for infantry doing these things.