I didn't suggest they should have, just that the main entrance might not be the best choice for one of them.
The idea is to get people to a place of safety and that may not be outside the main entrance. While it is important to get people through a fire exit quickly, there is nothing to stop that exit from leading people into a protected route, which takes them some way further before they get outside. Indeed, my local hospital has just such a protected route along a fairly long corridor that has obviously been designed to get wheelchairs out to the car park, across a significant change of level, but it also serves as access to offices.
Colin Bignell