Ppl don't like being looked down on and told they are poor so these items over here are all you can probably afford.
it's Good customer service to speak about all options and allow the customer to direct you to what they would prefer. So what if they are poor maybe they saved to splurge on this one trip. It's bad because you'd ideally what to treat all customers the same and well to get repeats no matter who they are. ╮( ̄▽ ̄)╭
Most ppl don't have the patience to be kind to some who is being rude and dismissive throughout their entire interaction.
Some ppl aren't push overs who will let this bad attitude slide.
Sure you can try and continue the convo but for them to dismiss you and then run away and have a completely new attitude to someone else tends to bring up anger in most ppl
Usually, "being polite" isn't a solution. In western countries, being polite in these situations could be considered as being shown as weak. In eastern countries, it's often seen as being a push over or a doormat. This isn't to say that's true, but that's the perception. And, most likely, the customer won't get a chance to "correct" any misconception. These scenarios are typically dramatization of how people feel when treated rudely or disrespectfully at a shop.
As someone who works in custom service, absolutely, I'd prefer people not flip out. However, almost every customer service job has at least some minimum training to teach NOT to be disrespectful/rude. This is 1000% intentional, which most people will have more of an issue with. It's one thing to be rude but it's another to be INTENTIONALLY rude and disrespectful to someone. This is basically someone looking you over and telling you you're worth less without using the words. THAT'S why the reactions are typically extreme in dramas and novels, etc.
What is so baf about being shown tge cheaper options when tge staff think you're poor...I mean tgey are helping no? Well I mean here the guy was kind of disrespectful so I can understand but I have seen so many kdramas and read manhwas with a similar scene and then tge mc flips out or something like anger issues bruv