there is 0 risk in early game, you cant destroy that thing if a whole okw army is defending it, only in late game is defeatable, everybody knows that. So, there is 0 risk in the first minutes of its construction
It was introduced by relic as asymmetrical balance choice since okw can't inflict engine damage with it's base infantry, leaving it very vulnerable early vehicles, which can be blocked by it therefore.
nope, okw gets a tier0 at gun to help it deal with vehicles, stop inventing things.