As a dairy farmer, I personally am not a big fan of organic milk, and couldn't raise animals that way. I know people do, and I support them, but it isn't for me. To be organic, you can't vaccinate or use any medication. Doesn't sound that bad on the surface, but to me, it would be inhumane.
The farm I work for went through issues with Rotavirus this year. Rotavirus kills 50% of the calves that get it on average, but can be prevented through a vaccine given while the cow is pregnant. I took care of 200 calves that contracted this virus, through a bunch of hard work and my going slightly insane, only six died. I learned partly of the way through that battle how to put in IV lines (minor surgery for calves) and after I was able to save them. They were saved with IV lines by giving them something that reversed their blood poisoning them, which is how calves die from Rotavirus. Dying from dehydration with your blood poisoning and killing you would suck. We have been free of Rotavirus since cows started being vaccinated against it - it successfully stops it.
I couldn't treat calves either for pneumonia. At the first sign of pneumonia I give them a shot of antibiotics and another thing to reduce their fever. This saves them. If I couldn't treat them I'd have to just watch them die which I couldn't do. Cows have no extra lung to spare, so getting them over pneumonia as soon as possible is key. Calves that get pneumonia which isn't treated soon enough will become poor milk cows. This farm also vaccinates for pneumonia when the calf is born and again at three months which helps a lot. But it can't stop everything so occasionally I have to treat them.
The calves I raise are treated humanely. More like spoiled. They wear blankets when it gets cold out, get fed warm milk mixed with yogurt twice a day, have dry warm bedding, get clean grain and water a few times a day, and are very loved. I know every one of them. Eggnog who likes to stand in her grain and water buckets to supervise me, Twitch who has huge eyes, Amber who knocks out her buckets, Ace who likes to drool in her grain, Chattanooga who always waits for her imaginary second bottle, Galileo who runs in circles, Tweety Bird and her favorite blanket, or Feta Chive who thinks every time she sees someone they are going to feed her. They are loved, well treated, and yes vaccinated and given antibiotics when needed. And I don't see a problem with that.
Rant over.