Hi,
I'm not talking about front line; I know they dont have to be there
But, usually, they are part of artillery formations alongside canons and other trucks.
On large maps, during large scale battles, it make sense to have them. The problem is that is so distinctive, they can influence the choice of opponents when they are discovered. They should be more ''anonymous''. These trucks are strategic elements...
About trucks, yes, the cabin is for more than 1 person, but usually, the commander and another member of the section take place there. The problem is that most of the time, full or empty, trucks explode killing all the crew. That's another things, trucks are rarely dammaged...
Thank you,
-Luc-