As someone who taught in an accounting school where awareness of Linux was higher than you state, I can tell you this is false.
Give it up already, face the fact that Linux is more popular and well-known than you want it to be, for whichever reason.
Android is a Linux distribution it is the #1 phone OS (73% market share this year). ChromeOS is a Linux distribution and is the leading OS by market share in K-12 schools. Both are cheap and easy. In ChromeOS's case, they are easier for both administrators to manage and users. I'm also sure the students using Chromebooks have not completed their CS degrees yet, but one can hope.
Linux community likes to pat themselves on the back thanks to Android and ChromeOS using the Linux kernel, yet they are oblivious to the fact that Linux syscalls aren't part of the official stable API, only certain ChromeOS models do run Linux (a yet another guest OS, WSL style), and then what GNU/Linux gets are Electron apps.
I'm not sure you could pull any random Linux user and have them truly understand Excel either.
As a Linux user who did not major in business, I bet your odds with Linux users would be markedly worse than with business majors on this one, hahaha
I'm not part of the group that downvoted you, but why would the only people touching Linux be CS majors? I'm not a CS major and I think most people I know that voluntarily use Linux on a daily basis isn't neither.