I understand what you mean but you can use any weapon at any time... you only need 1 lucky round and kill someone with a good weapon or good loot in the first round.
I have around 15 AUR and enough ammo without having the plan or share with a mate... same to many other weapons ... lots of sniper and MG´s.
To get a good weapon you dont need the sharing feature... we need this sharing tool for more reasons...
Example: you are out on a run with your mate but he is low or out of ammo and you are full, why I cant give him some ammo ? Its realistic to share stuff...Same for medics...
Example: your mate has 1.000 glas on stock and doesnt need one, why the hell he cant give me some who has no glas and didnt find enough ? he is my duo mate, outlanders helps outlanders if they are friendly 🙂
Also it is nice to share a simple weapon, why not? its a team play and teammembers help each other.