TL;DR: If you seriously hate (proprietary) UEFI and it's scorched earth for you, run coreboot and support the project.
In other words: If you don't trust the UEFI firmware implementation in your hardware, buy hardware you can trust (recommended) or replace the firmware.
It comes always down to this: If you don't trust a system, then don't use it.
How to Jail Break UEFI [...]
A jailbreak is a fanboy euphemism for a security vulnerability in products of Apple Inc. used by fanboy hackers to violate the security model of the operating system. No one wants security vulnerabilities in their software let alone hardware.
Please stay away from using fanboy euphemisms.
I want to point out there is NO such thing as “Windows Hardware”[...]
You couldn't be more wrong, because: yes there is. There is hardware built and certified for Windows as there is hardware built for OS X/iOS, as well as Android, Blackberry and everything else I probably forgot to list that has certain hardware requirements. Some software manufacturers charge you as a hardware manufacturer, some don't and some just don't want to make business with you.
This is Microsoft extending its own brand (software) upon firmware, claiming it’s their platform. Why do the manufactures accept this theft of their hardware product?
They want to sell hardware that runs Windows, because that was the leading platform from 1995 to 2005 or so and is still seen as the OS with the major market share.
Microsoft, as well as Apple, isn't a pure software company. Just read the news about their plans for the future and go to Wikipedia or somewhere else to read up on their achievements with hardware products.
There also were discussions and talks proving that one could throw out the Microsoft keys and deploy custom keys. It's just not feasible for the average user, but manageable if the hardware manufacturer did the UEFI implementation right.
Begin personal note
Also I have to say that I wouldn't buy a new laptop if it did not support the latest iteration of Windows. While running Linux to probably 99% of the time on my own devices, I always achieved good prices when selling used laptops with the best Windows experience possible (clean install from MSDN image with all drivers installed, but no bloatware).
End personal note
Point is: Manufacturers expect the majority of customers to buy Windows laptops and desktops and customers expect manufacturers to sell Windows laptops and desktops. That's just how it is: tyranny of the majority.
You can try to change this and talk to manufacturers, but they won't take you seriously when you use all that ideological baggage and fanboy terminology that doesn't apply to their business, because they just want to sell hardware and they don't care if it's Windows, Android or something else.