As always: Thanks for sharing this interesting session.
Imo it depends - as always - on the situation. Seeing it from a hunting perspective, young ones tend to get shot occasionally, but most often until they are more mature, still they are kids in a sense. And it also depends on if you are hunting, i.e. in Siberia or more in an urban area, where crops need to get protected from damaging animals. Mothers should get always protected, that they can still reproduce and grow up the other young ones. As far as I know, young female boars are taken out because the reproduction rate of wild boars is very high, and the younger, the more "children" they can have in the future and already within 8 months they can get pregnant.
Having said that, in very rare circumstances, very tiny boars get shot to get them out of the crops, if you have no other choice to take a more mature one. Also, here, the attitude should be important to kill an animal with the least suffering as possible. And these animals had imo a happy life, compared to the soulless mass-slaughtering of young ones. You only should kill, what you can use and always in honour of taking an animals' life and to keep a balance, that life can still grow.
At least these are my two cents.