You’re not paying for the OS; you’re paying for the hardware. If Macintosh hardware was buggy
when running Linux or Windows, for reasons to do with, say, badly-written ACPI tables, then you’d have an argument.
As it is, it’s the opposite: Macs run both Windows and Linux “easily”, while other vendors’ buggy hardware has to be patched over with heuristics in these OSes because it has non-conforming device names, responses to introspection queries, etc. Apple hardware is uniquely well-engineered. If you’re writing your own hobbyist OS, it’s a breath of fresh air to run it on a Mac, compared to other kinds of PCs.
This is, coincidentally, also the reason it’s so hard to run macOS on other vendors’ machines. Windows and Linux paper over all the brokenness in hardware land, and so machines built for Windows/Linux rely on these heuristics with sloppy integration work. Apple, meanwhile, just does the integration to the standard in their hardware, and then relies on said standards-conformance in their OS. If everyone conformed to hardware ABI standards as well as Apple does, Hackintoshing would be a matter of just dropping a patched dont-steal-osx.kext into your install disc and calling it good. Everything else you have to do is the hardware vendors’ fault.