@drizzy Most Pre-built PC and/or laptop manufacturers don't give options, information or any sort of indication even that other operating systems exist. You're just paying the price for a windows license with the PC that you may not even want and cannot really get refunded.
@Rush @drizzy the thing is that the majority of people wants a computer that works out of the box. Windows is the de-facto standard, but you can also get machines with popular Linux distributions pre-installed from the likes of Dell. Apart from that MacOS is also extremely popular, would you disagree?