Well, the last two times I was at the same store were both for battery replacements. One tried to upsell, the other didn't. And the one that didn't knew I wasn't buying so rather than waste time on me, he ended everything by saying he couldn't replace the battery. We both knew it was BS, but that particular store is always busy and he had metrics to meet. I wasn't contributing to that goal.
As a kid, I was often told 'no' for absolutely no justifiable reason, or simply to deny me something I wanted or was promised. My reaction to that was to always get as much info about something as I could, cover all my bases and go in prepared. I also try to solve my own problems through research before getting help. In this way, I minimize someone standing there and denying me. Or I understand why that is. 16 years with Sprint as my carrier also taught me that this should apply to business as well.
If you do things yourself, get things yourself, work around people and things that either try to block you or stop you then it's much harder for that stuff to be taken away or denied to you. So, I go in armed with info whenever I need to deal with a business. And that includes Apple.
But as you mention a lot of people don't. The argument I have found is that they don't have a lot of time. Which they imply to mean that they are too busy. But they aren't. What they really mean is that the thing they want done is not important enough to them to learn about, research and take action on. That's what salespeople, others, etc are for. But if it WAS important to them, they'd do all that. So, it's not about not having enough time - it's about that thing not being a priority, or even important.
Get with a group of average iPhone users and call all of them at the same time so all their phones are ringing at the same time. I'd make a bet that very few of them have actually bothered to change the default Apple ringtone. Why? It's not important to them. How many of them know how to change it? How many even know they can?! And that right there demonstrates the average Apple iDevice user.
We, here on this forum place a bit of importance and priority on Apple related things that are not remotely important to the average Apple user. It's why we are here. And why they are not.
It must be exhausting going through life carrying such a big chip on your shoulder.