I guess in short I don't get why people buy Apple products to do something you can probably do as well, or better, on a cheaper Windows device.
In my case, it’s because I don’t think you can do the things I do just as well on a Windows device. From the awesome 3rd party apps I just can’t find on Windows, to the design of the OS itself - it just works better for me. Not to mention the integration of other Apple devices and the hardware quality.
What you probably wanted to ask is “why buy a premium device when a cheaper one will run just as well” - because premium Windows laptops cost just as much as Macs. And the answer there is that some people want premium devices and can afford them, also people buy laptops to last them a long time so it’s worth it, etc.