We don't go "hey i've saved up $100000, let me buy a Merc". But that's what I see quite a few people doing . They "save up for an iPhone". If you have to save up for it, you better think of other uses for the money than a luxury item for wasting your time.
There's a different between "fine" and "luxury". You don't want to cross it, that's your prerogative. You can judge others, that's also your prerogative. But that doesn't make you objectively correct. The iPhone will obviously work better than your PoS chinese phone. You pay a premium for that. Don't hate on it if you can't afford it or don't want to afford it.