If the closed source editor is better for what I'm working on, I will use it. I don't work on NetBSD for example, and MacOS is giving me the best developer user experience of all the platforms I've tried.
At the end of the day, practicality trumps idealism.
All of my arguments were practical though. I use a few closed source applications when I couldn't find any open source alternative that did the job but code editing is definitely not one of them.
At the end of the day, practicality trumps idealism.