I've found that many people will go to great lengths to avoid learning anything new.
They want to be able to ignore their computers as much as possible, even considering the prospect of alternative software is taxing and upsetting for them.
I think that's basically how Microsoft and Adobe are so successful, they bought and cheated their way into the default position, and now they can do whatever they want with no real repercussions.
The user wants to click on the same icons with the same names as before, sometimes it's as simple as wanting the same name; if it's not called 'outlook' they don't want it, doesn't matter how well it works.
Windows in particular I think gets overlooked as 'good enough', it's only when you get into Linux that you really understand how far it has strayed from the light.
You don't need to spend hours and hours to start, you can dip your toes in with WSL, maybe use a Linux VM for a few tasks that make your life easier at work. It's not an all-or-nothing affair, but having proficiency in more than one operating system is great professional development regardless of your personal computing preferences.