Maybe they do, but evidently consumers accept it and are still willing to pay for it. I don't know whether non-standard screws are a trade-off that Apple needed to make a better product, but it's a trade-off consumers are willing to accept. That indicates that on the whole, Apple's non-standard behavior is still more valuable to consumers overall than their less successful standard competitors even if it is horrible to a minority.

Only a competitor that consumers like as much as Apple but also has standard screws can prove Apple wrong. Or, alternatively, maybe a day will come where consumers care about standard screws/repairability as much as you do. Until then, consumers will continue wanting Apple's non-standard stuff over the rest of the industry's standards, and what consumers want is pretty much the only thing that matters (with few exceptions, of course).