Same reason forklift wheels are in the back. I drive a fairly long vehicle and a lot of times it’s just easier to maneuver backwards.

Also I have a much wider field of view to look around for people or children not paying attention when pulling out of a parking spot.

If you pull in forwards, you can only see directly behind you until basically your entire car is out of the spot, especially if you don’t have a backup cam. If you pull in backwards, you only have to drive forward a foot or two before you have full 180 degree field of view of everything coming from both directions.

All the sass is just coming from people who aren’t confident in their backup skills.