I think that in context of all the other messages eg stock pile and prepare for emergencies etc there is a feeling of 1970s when we had to prepare for a war. It’s all quite alarming.
As it is, the army is small, elite and highly professional and does not want a bunch of kids messing things up.
However it might be one way to end migration when it ends up in conscription
There are serious issues with Russia and China and their alliance etc and one thing they have is manpower.