Please tell me this is a joke. You have to have 0 knowledge about Linux Desktop to claim that Linux users are doing a sysadmin's job when they're using their systems. Calling Linux users sysadmin would be equivalent to calling Windows users Microsoft's QA team haha (ngl, they actually are).
We love Linux because it gets work done, for free, without hiccups that Windows often introduces, and without being a bloated spyware and adware mess that is modern Windows.
Linux introduces more hiccups for me than Windows.
Having something for free is not viable in long term, work and efforts must be paid. Seeing projects without funding is not a good sign from my POV, doesn't let product owners and project managers to have strong base and planning.
They've been saying this for the last 30 years, FOSS still isn't slowing down.
Like I said, whether you like it or not, FOSS is coming for their pockets. No amount of candy crush in the start menu can save them.
I'm pretty happy where Linux desktop is right now. It's popular enough so that big software advertises "Windows, macOS and Linux" support, but not big enough to get the "I've unplugged my mouse and now it doesn't work, how can I fix it" posts in the Internet.
So Windows isn't big enough either yet I guess.
Not sure where you are getting this fan boy style impressions on I'm against FOSS from.