False. Linux is mostly used as a server operating system. Linux has a very small market share in the desktop market ... a few percent at most; if you include tablets and cell phones in the consumer computer count, then Linux' market share drops to less than 1% (the big ones are Android, iOS, and Windows, in that order). It has an extremely high market share in the server market, depending on who you ask it is somewhere between 50% and 90%. In some specific server markets its share is even higher. For example, among supercomputers (the big scientific and national security machines), Linux market share is 100%: every single machine on the top500 runs Linux. Among the big server companies (like Alibaba, Amazon, Apple, Baidu, Facebook, Google, ...), Linux runs the vast majority of all servers; and those companies have more computers than there are consumer-owned laptops and desktops (today there are more servers in the world).
While you may very well be right from a technical point of view, Windows is also a massive success in the market place, and remains it. Among desktop and laptop machines (excluding cellphones and tablets), Windows has a market share of ~90%, and only MacOS gets anywhere close. Linux is in the single-digit percents (I think about 2% or 3%), and non-Linux OSes like FreeBSD are in the tenths of a percent.
For the average non-specialist computer user, Windows is, for better or for worse, the #1 choice.