On the flip side, if you want easy configuration, then yes, vim/emacs/similar are not necessarily the right choices for you, but I don't think that means they are generally bad options.
I don't think this advice makes sense at all. I can't maintain cc-mode and I don't understand how it works, yet I rely on it.
Users should not be expected to understand how the TypeScript autocompletion works in order to get it working. I can open VS Code on a TypeScript project and get autocompletion working just based on the tsconfig.json, much of the time.
libraries live or die based on their interface.
Hence why, despite my interest in Fish, I'm still just making do with Bash, I just can't justify the time to make a proper switch.
Sure, there are a bunch of choices for you to use... but now you have another problem -- there are a bunch of choices.