You are welcome to make your own personal demands on the market only if you are willing to pay for them, or in this case, if you can find many thousands of other people also willing to pay the price.
It's pointless just claiming a "right". You have no rights. You can't force anybody to supply what you want except by enabling the supplier to make a profit. As it is, you're expecting them to make a significant loss.
It's not just a question of removing Windows (or whatever OS you have installed for burn in and testing). There's the huge cost of qualifying parts for a different operating system, the extra tracking and stock-keeping costs, extra advertising and marketing costs (that will reflect the small number of units shipped), and the high cost of supporting Linux.
Since any 157 Linux buyers typically want at least 57 different versions of Linux, and a fair few want to dual boot because they actually do use Windows (for games, iTunes, whatever), the whole idea is a non-starter....