It matters very much how you park.
You can see much sooner and better if it's the nose coming out, rather than the tail.
That's why pulling out forward is much safer.
You have 3/4 of the car, much of it actively blocking your view and offering vastly inferior sight lines, behind you when backing out of the space.
You have only 1/4 of the car, and virtually all of that below your line of sight, when pulling out forward.
Even most cars that do have an separate rear cross traffic system do NOT have a front cross traffic system because of how much better a view of cross traffic you get pulling out forward.
A vastly smaller portion if you pull out forward though.
Then I'm confused why you keep trying to argue what you've apparently already been trained, by multiple people, is the safer way to park, and the safer way to exit a space.
You say you always back in- so why do you keep asking about REAR cross traffic alerting, when you're always going to be coming out of the space forward? (which is the safer way to do it regardless of what aids the car has)