Thats the thing - they’ve passed the mandatory military service, so they know how to follow orders and maintain discipline, but they went home and became doctors/programmers, now that there’s war, they are given arms and asked to remember their training.

But then they aren't just giving out guns to civilians, but they are calling them back to service (i don't know the proper english term for this).

In the US, we have active military members where they are 24/7 soldiers. There are also reservists where once a month, they get together for a weekend to do solider stuff. There's also a two week stint once a year to keep up training. So not quite as well trained as active military, but a hell of a lot more well trained than just handing rifles to someone with a slap on the backside with a "good luck" for extra measure.

Otherwise, calling a retired active military member back to active service is known as being recalled.