There is little reason to bowhunt either, but people do it. Everyone who does something, anything, has some reason or motivation to do that thing.
Your statement seems to fall into the "I don't like it, so you shouldn't do it" category, in my opinion.
Pretty simple way to manage it though. You aren't in favour of using a .22 centerfire on deer, so don't. There, isn't that simple? You don't like it, and you don't have to.
I will say though, that years and years ago I was of the exact same opinion. To the point, that when I saw a rather prolific poster here talk about shooting a larger bodied muley on a long since gone forum, I went off about how un-ethical it was, etc....
And then that fall watched my grandfather stack up a couple of running whitetails with two shots and a .222. Dearest old pappy at that time was a gun nut like no other I knew, and had a lot of rifles. A lot. And he used an old BSA .222 with a fixed Weaver 10x by choice, as it had almost zero recoil, and was quieter and he liked that rifle. That was all the reason he needed. He liked it, and he could.
After that, it changed my thinking abit. And I did some research, and some testing, and now the .22 centerfires are some of my favorite deer cartridges. Efficient, handy, and effective. What more does a person need?