I had defense readiness classes in high school back when there was still debate in my country whether to phase out conscription (which eventually happened) and

I had defense readiness classes in high school back when there was still debate in my country whether to phase out conscription (which eventually happened) and our teacher, a retired colonel(who was against phasing it out), told us one thing that stuck with me: Conscripts are only good for defense - they know the area and the local language/customs. Additionally, they stand to lose their friends, family and possessions, so they're motivated to do something about that. None of these advantages apply on the offense.