I'm not saying that you don't know what you're talking about,nor am I saying the point you've made is nonsense,because obviously you know more about this stuff than i do,clearly.
Now,
My point is that we have the ability to ip ban users ingame when we are op.
You say it's useless due to reasons stated above.
That's fine and all, but what I getting at is, adding the feature burned spoke about is just to make it easier to do so, as opposed to typing it out.
Take into consideration the nudging system,
Instead of nudging a person from 4th-10th you can simply type /nudge nigma 10, or /nudge 10 nigma, i forget avhjvdkhbcxsxv
Anyways, there's also the kicking system.
Instead of /kick player4, we have /kick nigma.
Technically this is all useless shortcuts, but it's still handy to have around, just like the /banip PersonX would be.