Even though I, personally, feel the way you do, the above doesn't ring true. Many people crave those small interactions with strangers, and welcome the opportunity to talk about themselves. That's the reason they're a social norm.
You sound like someone who has never worked in any customer facing position. Many people come in wanting X. They don’t realize X has many consequences. You know if you just give them X then they’ll come back another day, leave a bad review, or say, “but why didn’t you tell me this?!?!”
I mean, ffs - this happens to me as a customer and I’m thankful. Sometimes there are obscene arcane scenarios that you can’t find out about through regular means that only that service rep will know about. They are mostly fine if you just explain what you’re doing - they’re safe guarding the company’s reputation. They have nothing against you asking for weird shit - they just don’t want your bad shit later.
So you walk into the Apple store, walk up to an employee and when confronted with the question "How can I help you today?" what do you do?
Telling them "I would like X", seems like an unneccesary level of "explaining yourself". They should just know and understand exactly what you want from non verbal signals?
Very annoying, I want X thats why I asked for it, I dunno if I want Y because I didn't spent time researching it like I did X. I want X not an argument there are lots of other place I can buy X if you are going to be difficult about it.
I hate this, the idea that I should have to explain myself to a random stranger in a shop as if they are entitled to know anything about me. I buy a lot of sweets on Friday for the weekend and regularly the clerk behind the till will make a comment, "Thats a lot of chocolate! Who is going to eat all that! You must be having a party whats the occasion?". In front of a line of customers who are eager to get home I have to explain myself to the clerk "Im depressed!"... and then just stand there awkwardly waiting for them to finish doing their job.
I get it they are just trying to be friendly but I don't want it no one in the queue behind me wants it, no one wants to explain themselves to a stranger we will never meet again, I just want the sweets / laptop please and thank you.