That's fair, but in a week you're effective, and after a month everything else seems wrong - like typing with oven mitts on.
But I enjoyed learning vim. It was like learning the controls to a game that I get to play every day. Now ten years later, I'm still finding little tricks and optimisations. I'm still having fun learning vim.
If that doesn't sound fun to you, then I get why it isn't worth it, though.