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.
For a certain area, I back in to a parking space so that the sun in the afternoon is coming through the back window. This means that my drivers seat and steering wheel are not the temperature of the sun when I have to drive away. Other people may park in different ways to avoid the sun in the morning should they prefer to drive out to get lunch.
Excellent logic! Sometimes I do the same at work. When I was a smoker, I used to decide orientation so the sun is not shining on the front of the car or into the driver side directly so i could sit in my car and smoke without my arm sunburning on breaks. (Thankfully, I quit smoking and making my car stinky, tho I let passengers smoke if they want to, just occasionally.)