I consider parking lots more dangerous than the regular road. On the road traffic goes in a predefined direction, there are rules. Not so in parking lots. Wife was backing out, the other guy was doing 40kph down the laneway. The outcome was not good.

There have been close calls for me walking to the store.  I tell my kids the parking lot is a very dangerous place. People do not pay sufficient attention. you cannot change other people.

It is best to try to drive through two abutted parking spaces so that when you leave you can just drive forward. Backing out of a parking spot is fraught with difficult sight lines and many hazards, both pedestrian and car. Why increase the risk with almost no reward? I try not to back out of any parking space if I can, even if it forces me to walk a little farther.