But if a body (organic or mechanic) gets caught in the opening and mulched by the doors, that's a whole lotta cleaning up involved, and that's if the doors don't jam from all that matter caught in them. Yes, in the event of decompression or a firefight, these doors need to close quickly for the safety of the onboard personnel (and to prevent pesky intruders from escaping, natch). These are quadruple-section doors that close in from the corners, leaving an increasingly-shrinking square in the middle. Heck, the superlaser cannon has two crew members perched on the itty bitty platform right next to the gigantic superlaser beam!
Their hangar bay has a giant, open elevator pit right next to where the ships would land. There are giant doors that slam shut in the blink of an eye. The tractor beam's power is controlled through a panel perched on a tower over a bottomless pit, and the catwalk to access the controls is about a foot wide. You have massive chasms with very tiny bridges that can be retracted, and they have no railings or support at all.