I agree this is pretty much a non issue for the average developer, but those of us who work on network infrastructure, as red-team hackers, or do any work on embedded systems can attest to how much of a pain it would be to not know how to use vi/vim.
You haven’t lived till you have to edit using only sed.
But not having a basic text editor that is probably a few hundred KB feels a bit silly, especially given how many environment dependencies usually get packaged into containers anyways.
That's like not including any sort of a shell in your container and wondering why people are having troubles with debugging.
Personally, i think that just basing container images on something like Alpine, Debian or even Ubuntu images is good enough because those are stripped down enough already for the most part.