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.
You can fit in way smaller spaces when backing in. Once you get the knack for it it’s not really harder than going in forwards either.
protip: look in your side mirrors and pretend it’s a video screen. if you want to go left steer left, if you want to go right steer right. Don’t even start thinking about “It’s on the left in the mirror so on the right in real life, but it’s backwards so…” or you’ll have a bad time.