I'm happy to forgive that kind of small typo in a hacker news comment, but generally it's easy to catch these things by just reading over the thing one time. If you're putting any amount of thought into your contribution it should be much faster to read it over one time than it was to write in the first place.
You're right that changing the whole editing model will involve rewriting a lot of keybindings. You could do that in vim if you really wanted to -- start by remapping motions to enter visual mode first. I don't really know why you'd want that when visual mode is already a keystroke away, but that's ok.
FWIW though if that's what's important to you, I get the sense that kakoune is much more vim-like in making it easy to compose with other tools, while being set up for your preferred editing model.