Sure, that’s probably the most major reason. Having an app store that requires apps to meet certain quality standards, respect privacy, and not contain malware

Sure, that’s probably the most major reason. Having an app store that requires apps to meet certain quality standards, respect privacy, and not contain malware is part of why people are willing to pay a premium for iPhones. It goes without saying there are other factors, too, like the high quality hardware and integration with cool accessories. Again, it’s not an accident that iOS apps are more profitable than Android apps. Apple’s overall ecosystem is designed to attract people who are willing to pay for good products.