I had Windows 8 RTM installed on an old ThinkPad that I eventually wiped clean and put Ubuntu on. Granted its not a new laptop with Windows 8, but still, its not impossible to install Linux on a Win 8 laptop.
No it doesn't. There were plenty of pre-Win 8 motherboards that had UEFI on there. Apple's been using it in their computers since the Intel switch in 2006. I don't know what you think is going on with your computer, but every other Windows 8 computer I've touched behaves identically to all other PCs, with the exception that Secure Boot is turned on by default.