You're asking average people to learn a new language so they can install software (thats not on the stores) or to do some beyond basic configs. Why should they bother learning bash when they could just use windows and learn somethint else with that time?
How many times did i find a post telling me to create a weirdly named txt just to change my touchpad settings? Its not trustworthy for noobs. How is a noob suposed to know if a command on a tutorial is safe or not if many linux distros let you destroy them via rm -fr? Are they supposed to search each and every command before they use them? Im sure lots of people rightfully reject using the terminal (and therefore linux) for this reason.
As the other comment said, not OS friendly XD