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.
I worked at an Apple Store in 2010. There was no commission. I was a sales person at the time.
A college student had a bad interaction with one of our sales people and asked a manager to be helped by a female employee. We had none available and I was asked to assist her because I wasn't aggressive.
An asshole pathological liar, who later got fired, had tried to upsell her for no reason. The MacBooks with Intel processors were plenty fast. A 13" MacBook Pro was more expensive and offered no benefits for her student needs. I don't remember the rest other than she bought the MacBook, which was what she wanted when she came in.