Why does someone need to specialize in architectural photography to take a picture of the inside or outside of something? Well, like any discipline in photography, there are styles, tips, tricks, rules, and things that need to be understood before shooting something. For this reason it requires someone who specializes in it and not somebody who does everything.
Here is a before/after of a photo from Lost cabin Beer Co. The before photo is a single exposure. The after is a total of 34 layers (including adjustment layers).