Obviously, to run the script, you don’t have to type any command in a command line 
Eg, on macos, just open Finder and double click any script that has the .command extension and the executable bit set. Same concept of executable scripts exists on windows and most linux DEs.
The REPL is a command line, so it’s odd to use one and fear the other.
I was surprised to hear that some only use notebooks and never touch the REPL. Still, if using a command line is too scary, then surely so is writing Julia code?
I have been using MacOS for over 15 years and I haven’t used once the .command file, actually it is the first time I learn about it. Anyway, either you or someone shall prepare this script file for you. It seems even harder than just open the terminal and run julia script.jl?