>>57473398No? The staff goes inside and outside exactly once a day, when they arrive at work and when they leave work. Why would they go outside all the time? They work IN the hospital.
But that's not even the point, I assumed you don't work at a hospital.
When you go to a hospital, you will stay there for a while. You don't need their services often, because it needs you to be in a pretty dire situation, which is uncommon. A door wouldn't be annoying because you very rarely use it, even IF you happen to go to a hospital. You use it when you enter it, then you are in the hospital for a while, and then you hopefully leave it soon.
Now imagine yourself playing a Pokémon game (scary for some people here, I know). You just caught a new Pokémon, which you had to weaken first, so you go heal it - you enter the Pokémon center, you heal your Pokémon, you leave. Your try to train that Pokémon, but it is underleveled and has no EVs, so it's almost fainted after just a battle or two. Off to the Pokémon center you go again - you enter the Pokémon center, you heal your Pokémon, you leave. Then you fight a couple of trainers. Half your team is low on HP, off to the Pokémon center you go - etc.
I'll just assume you have played enough Pokémon yourself to understand what I mean and how often this happens. You constantly enter Pokémon centers in the game. And if you assume other people function in-lore the same as the player, they also do that all the time. Why would you add an unnecessary barrier to all those people? It's so much more convenient to have it open.
You see this so much in the real world in spaces where people enter shops only shortly, for example to buy a snack at a train station or whatever. Because these people just want to make use of a quick service with as little friction as possible, because they just want to go back to their own tasks ASAP.
I explained this as detailed as possible. If you STILL don't understand, you cannot be helped.
