I'm gonna disagree on everything here...
> 1. If you don't encounter any trouble daily driving GNU/Linux, that is actually a sign of inexperience. That or you're doing nothing interesting.
I do loads of interesting stuff on linux, I use it for research, numerical computing, biology etc. None of these things cause linux to skip a beat.
> 2. If principles mattered more than convenience, most Linux users would be on FreeBSD or OpenBSD instead of GNU/Linux. Either follow your arguments to their conclusions, or understand that Windows/macOS users are doing the same thing as you—making practical tradeoffs.
The world is not black and white! There are degrees to which people behave, and there is a spectrum of behaviour that abides by certain principals and doesn't. I had someone say to me recently that they didn't believe there are 'ethical people', instead people make use of the opportunities presented to them. This isn't true and is more a sign of how they've justified their own life choices.
> 3. Unless you are doing tons of system administration on your daily driver, most of your time is spent in applications, and the choice of operating system doesn't matter too much.
I, like many people, tend to use more than one application, so I find the OS does matter. On Windows 10, when I hit the start bar, and start typing the name of an application I want to launch, I really do care when the bar sits there loading up, scraping internet data to show me its suggested apps and adverts.