Yes, that makes perfect sense. If they want to set up an alternative editor, doing it on their own time is a reasonable expectation. No question vscode is millions of times easier for juniors.
These kinds of hyperboles are really really bad. You are stating that if it took 1 minute to install a plugin and get to work in vscode, it would take 694.4 days to do the same in other editors? Please use reasonable numbers if you are trying to make a valid point.
Not just 'other editors', I was thinking about emacs specifically. I think my point was fairly obvious. Maybe not a million times, but probably hundreds. Vscode and other modern editors use key combinations everyone knows by default, eg. C-q, C-c, C-v, etc., have gui directory browsing- so there is essentially no learning curve.
It takes weeks (at least) using emacs/vim until text editing/movement starts to pay off. There's no learning curve for `M-x package-install`, but if there is some variable that needs to be customized, like the path to an executable or something, that's a whole rabbit hole to go down, and at some point you need to learn lisp or you'll waste a lot of time being confused by errors.
During the only programming course I took in college, one in which emacs was required, I spent as much time learning emacs as anything else (it was also the most valuable thing I learned so I'm grateful in the long run).
It's not just the code, we'd want everyone on the team to use the appropriate toolsets including debugging and error checking support. They can set it up in Vim and Emacs if they want but it saves time for the team as a whole if we all use a standardized set of tools.