Apple hardware capable of running macOS may be expensive, but "locked down"? Definitely not. You can run Debian on anything from old PowerMacs to the new M1 model, although I admit that the driver situation on M1 isn't feature-complete.
Really? Please let me know where I can get the latest MacOS for free to replace Windows with it on my PC.
Besides, there’s guides-a-plenty all over the internet about making “Hackintoshes”.
By that logic iOS and Android are also free and you can alo get Windows for free with various OEM Laptops and system if we use that logic with the difference that you can choose to purchase Windows licenses to use on a machine you build yourself vs the inability to purchase an separate MacOS license without any Apple hardware.
So any comparisons on the price of the OS are moot since the cost of MacOS is priced into the accompanying hardware, MacBook, iMAc, etc as you cannot buy it without.
Microsoft also distributes Windows "for free" on their website and if you care not at all about license terms as we evidently don't when it comes to Mac OS, then it presents no moral quandary to disable its activation annoyances. Is Windows free?
Correction: It has no cost for Mac buyers. Those are the circumstances.
Violating the EULA that Apple makes you agree to during install (by making a Hackintosh), while a tortuous action, is not necessarily illegal, and it doesn't cost money.
Where please?
If that is the criteria for calling software free, then it's not a useful label.
Every legal macOS installation has been paid for with money.