screen position

This is a fun little thing I wanted to know. Why is it that almost all RPGs have the health and status bar on the left side or bottom of the screen. So I typed in everything I could think of to find a reason why this was true and I found out that there really is no historic reason clearly stated however my theory is that its set on the left and along the bottom for two reasons. One those spots are out of the way and allow the player to see what’s going on in the playing field. Reason number two is that player in most cases is trained too those spots by habit. So its most likely going to stay the same just because of tradition instead of any real reason.