Maybe you should collaborate with Chris Titus Tech. He's a MCSE that switched to Linux (pretty much completely) but is also a Youtuber and I learned A LOT from him.
My main reasons for using (in no particular order):
1. As low on resources as you want it to be and FAST! Especially on older hardware! I dont think I have a PC/laptop older than 5/6 years that is running Windows.
2. Obviously security, although I think I recently read an article that sudo has a vulnerability. Yikes!
3. Telemetry. Afaik, there are none or you can choose to completely disable it (let's ignore ubuntu ftm)
4. It can be really simple. Sure Windows is great. Lots of features can do a lot, but they pack it all in whether you use the features or not.
5. I "feel" more in control of what's running on my PC.
6. Safe repositories/sources for software.
7. Less maintenance. I have installed Mint for all my elder family members. Those PCs are the most used by them and I get virtually no calls to repair them. When i ask they always say "it's working great". When there is something wrong it's usually because a website they went to is telling them they need to install an .exe file and it doesnt work. Tehe.
8. Logging into a console session and being able to start/stop services, manipulate files, make backups, update, basically do anything as if you were in front of the pc directly.