Because Linux is still not made for the causal computer user.
Most people don't want to spend hours mounting and partitioning drives or care about Kernel Versioning or nVidia drivers, they just want to turn their computer on and it works.
Hell, just finding a Linux FAQ that doesn't descend into maddening techno-babble by the 5th question is nearly impossible.
For example, go to https://www.linuxquestions.org/questions/linux-newbie-8/
These are the current leading subjects in the NEWBIES forum,
*Replace VAH path
*ERROR 1045 (28000): Access denied for user 'root'@'localhost'
*Rename subdirectories recurseively
*how to setup timer in writing device driver/user space program
*Removing Quota Check at login?
*How To Export Display When VPN With VPN Address Bind To 127.0.0.1?
yes repeat, these are not for the hard core programmers, they are for the Newbies to Linux.
That is why Linux is still far behind and will continue to be so
Got a bit of a headache just reading it and I used to use DOS. I like Linux Puppy though. :) It is also a time thing. Why spend time learning the new commands when we have to keep up with who is now our enemy and where they are infiltrating our neighborhoods.
“Most people don’t want to spend hours mounting and partitioning drives or care about Kernel Versioning or nVidia drivers, they just want to turn their computer on and it works.”
In five years of using Linux (alternating between Ubuntu and Mint) I have never encountered the issues you mentioned. I never became a Unix geek, because Linux does not require me to. Current versions will automatically partition the hard drive for you. Really, those distros of Linux are easier to install than Windows. You might have problems with the newest or exotic machines if the drivers have not been written yet, but I never had any problems installing on an older desktop PC with a generic built-in video card. I bought a Dell dual-core Optiplex at a yard sale for $15. Within a hour, I had replaced Windows XP with the latest Ubuntu “Mate”.