Good logic bro, except both Wehr and soviets were able to have mortars right after start and their armies is balanced around that fact.
While USF never ever was intendent to have non doc mortar aswell as OKW MG34. And USF with supperior inf for some reason can have supperior mortar right off the bat, while OKW with shitties main line inf and shittiest MG in the game, still forced to tech up to get this MG.
Biased much m8?
Do you even have a clue WHY the mortar is in T0?
The whole point of its existence is for it to be T0. If it was to be anywhere else, it could be just as well removed again.