Antibiotics for dairy cattle are necessary when they are sick, however, if she is milking when on antibiotics that milk does not enter the milk cooler and isn't added to the milk that goes to the dairy.  It is dumped or maybe feed to the cats in the barn but it never goes for human consumption.
Hormones do not keep the cows lactating.  It increase their milk production but she still only milks for about 10 months and dry for 2 months and has a baby to start the cycle again.
I know that commenting and correcting your wrongs will not change your mind but at least try and educate yourself on the real facts.