I think Apple Safari web browser maybe one of the main reasons some people buy an Apple device like an iPhone or Mac computer. Apple Safari web browser is only available for Apple Devices, so if you want to use Apple Safari, you need to own an Apple iPhone, iPad, Mac computer, or Apple TV.
Some people maybe too used to Apple Safari's user interface and features where using other web browsers like Firefox, Chrome, Internet Explorer, Edge, etc are not good for their needs.
There also maybe some people who trust Apple Safari more than Google Chrome, Edge, and Firefox at keeping them safe and making their web browsing more private by disabling tracking cookies.
Some people maybe too used to Apple Safari's user interface and features where using other web browsers like Firefox, Chrome, Internet Explorer, Edge, etc are not good for their needs.
There also maybe some people who trust Apple Safari more than Google Chrome, Edge, and Firefox at keeping them safe and making their web browsing more private by disabling tracking cookies.