Well anyone wey suffer and struggle to make their money has the ultimate right to spend it how they choose to.
I actually don't see any problem with owning an iPhone 15 pro max if you have the ability to buy it.
And don't forget that the iPhone 15 pro max has amazing properties that people can use to boost their business especially for video maker and photographers so it's actually not wasteful, the problem I have is for those people who save up money to buy the phone.