Most newbies aren't aware of Linux operating system. Installing and using Electrum on Linux for such people may be out of question, I know that it's safe to go with Electrum on Linux but most users aren't Linux users so it won't be easy for them to move from Windows to Linux and install Electrum on that new operating system.
Why are you sure that using Electrum on Linux is safe? Do you know the meaning of the expression monkey with a grenade?
You can just as easily expose yourself to a virus by copying the wrong command into the terminal and being exposed to a virus.
On the other side, I am a Linux lover and very careful when handling it, but even as an amateur, not a professional, installing an electrum wallet from Appimage seems to me to be one of the simplest things.