Because it is. What is an “industrial OS” anyway? Also it’s important to remember that “Linux” is just a kernel (the software that acts as a “bridge” between the rest of the OS and the hardware). Android is Linux, Ubuntu is Linux, Arch is Linux, Debian is Linux, Slackware is Linux, etc. And yet those are vastly different OSes. You would maybe run Ubuntu, Debian or RHEL on a server (which maybe you could consider industrial). But you would never use Arch or Android on a server. Android is the most popular mobile OS, would you consider that industrial? And for the desktop, the average user would use something like Ubuntu, Linux Mint or Fedora. But you’d never use the graphical version of those on the server and I don’t think they would be considered industrial OSes.
So anyway, what’s your point exactly?
Linux was actually developed as a (kernel for a) desktop OS. It doesn’t focus on the server or the desktop, distros do that.
What distros did you try and when? In 2023, you can totally set up Ubuntu or Linux Mint without using the terminal. Obviously for “power-user” settings you might need to use the terminal or edit config files, but just as regular users cannot do those things, they also don’t need that functionality.