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.
I started when I had a Smart Car, which made backing in really easy. The front wheels are almost in the same place as the back wheels, so the car almost rotates. It’s a shame they weren’t more popular.