To me, it seems objectively easier to pull into a parking space forward and then back out of the space when you are ready to leave. You don’t have to line up with the lines while driving backwards, and it’s easier to keep from hitting other cars as well. So why back in? To me, the only advantage I can think of is that you can get out quicker, technically.
Edit: I do not need driving instruction, just wondered why. The reasoning.
Those are all things you need to pass to get your driver’s license here in The Netherlands. We still have idiots on the road. Granted, they don’t (or at least, very rarely) slam their vehicles through the fronts of stores and houses, but we still got idiots doing idiot things.