I've also returned Apple products multiple times, once (recently) without the packaging, and once several days past the return window. They refunded me every time, no questions asked.
This makes me wonder if it's part of their training?
Can be a little annoying (an employee actively tried to downsell my partner, even though they knew what they wanted), but overall it’s a nice practice.
Incentives matter more than training.
My experience is that they are more focused on finding the right product for your needs. I've been there more than once where they happily downsell a customer.
"Umm, I kinda look like a student."
"Good enough for me!"
I got a student discount.