All these anti-IDE rants strike me as coming from people who have never actually used an IDE beyond "oh it's an editor with an autocomplete".
In this case, mental exercise keeps the brain healthy.
I would absolutely fire someone who refused to use the mechanized tree harvester I provided and insisted on felling trees with an axe, and that's about where I stand with respect to insisting on using PDP-10 era text editors over an IDE.