Warzone firefight on skirmish on darkstar

So just now we got the defend the core objective on darkstar and i was wondering why 343i did not make doors you know like the ones on the big gates by the bases so that the players can close after 1 minute so that way the objective is not completly overun everytime the doors should stay closed for about 30 seconds that gives players some time to kill the enemies inside or get back or collect ammo

i feel you. they’re behind on making a lot of much needed changes to the game, including this one