[alberto180]

Sorry that's both just wrong. The A320 Doors open to the outside (as can be seen here https://www.airplane-pictures.net/photo/1364569/d-ainb-lufth...), and also come with a mechanical opening aid that Boeing doesn't come with, because of the Grandfathering of the 737. And emergency exits in "Europe" obviously open to the outside. At least in West/North Europe

[j-a-a-p]

Nope, you are wrong on both accounts. OP is referring to the emergency exit and why it would make sense to make them fail save. These doors are located above the wings. Your picture shows the normal entrance door. This door is gigantic and has all sorts of safety procedures to keep them closed.

Boeing opens the emergency exit to the outside and we all know that they will just pop out during flight every time they forget to bolt them. Airbus has a fail save design: unlock, pull in, then throw it out. No way you can open these during flight, with or without bolts.