I would add that a short barrel hurts the 10mm ballistics for carry so why not a 40, you could buy a 9x25 6" barrel and the velocity/ weight suggests you could hunt with it so it means trauma but then you're not shootinga 10mm.Curious as to who the "they" is that teaches Mozambique for 9mm and not for 10mm.
The big reality check that you should walk away with is that there is no "devastating " handgun cartridge that one would ever realistically carry for SD.