Can someone explain to me : Why can we first spawn Heli in GRB?

Why we can first spawn in a helicopter with rocket in GRB ? I’m “Ok” with CAS but that is no sense for me… Do am I missing something or it s just unfair ?

Why would you bother

first spawn helis only get dumb rockets or their cannon.
You can shoot them down with mgs.
You only need situational awareness.

Most mbts even got air tracking at this point,1 single IFV shuts them down completly as well,