I do understand what "client-side" validation is, but I wish it had a different name, because people think they can just validate client-side and they do not bother doing it on the server... for some reason, I do not know. It should be obvious though, right? Yet it is not.
https://html.spec.whatwg.org/multipage/forms.html#client-sid...
I definitely see your reasoning for wishing it had a different name though.