All free tilesets face down?

Idk if this is the place to ask this but how come almost all free tilesets have the tiles faced down?

What I mean is, if I want to decorate a room, all the closets, bookshelves, fireplaces and such on pretty much all tilesets I’ve found will face down, so I can place them on the top wall of the room but there’s nothing for the left or right side. I don’t understand why this is, and how do people work around this? Is there a way to modify a created tile/sprite to make it face another direction without creating it totally from scratch? Or do people really only place stuff on top walls, or am I just blind to differently faced tile sets? I’m making a 2d rpg by myself so I’m trying to avoid having to make all my art from scratch, but I can’t seem to figure out how to make all this work, any help would be appreciated

you should check out these videos :

Blender: How to bake one object with multiple materials - YouTube