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.
Once you reverse park for a while, it actually becomes easier than forward parking. It is also safer, statistically proven, and easier to get out. And in the case of an emergency, if you are getting chased then you just pull out and drive away asap, no need to reverse slowly; if your battery dies, the hood is right there easy to change or jump start the car.