EP '14 mechanics/balance

[Nitram Draw]

A quality units (and some B quality units like French colonial forces and the lesser gods amongst Guards units) don't get replacements. If a C quality unit takes about 100 losses, it loses ~10% of its strength but can recover quickly, but for the A quality units the losses are permanent.

I've always wondered why some units never get any replacements. Is every loss a death or incapacitation for those units only? Surely some could make it back in a 30 day period. Same with artillery, couldn't some be repaired? These same units get replacement in the smaller scenarios but not in the long campaigns, at least in France '14.