I've been working my way through the show "The Expanse" (I'm about midway through season 3) and have just started reading Leviathan Wakes.
Both the book and the show seem to have a lot of casual references both on- and off-screen to "getting spaced" where you toss someone in an airlock and then press some buttons from the inside and the outer door opens and they die of vaccum exposure.
But why would it even make sense to be able to open the outer door of an airlock from inside the ship/station? Wouldn't it be more natural to build it with the controls for the outer door inside the airlock? No scene ever seems to feature someone "hotwiring" the airlock controls or anything like this. It just seems to be a built-in feature. What's the in-world explanation for designing airlocks this way?