Sure, that's a reasonable argument, but that's different from the argument of "should we, as society, try to wean people off horses". If airlines want to discou

Sure, that's a reasonable argument, but that's different from the argument of "should we, as society, try to wean people off horses". If airlines want to discourage passengers who need horses for practical reasons / for the good of the airline, that's one thing, and we can discuss what the airline's needs are (and even whether there's a way that the airline would be happy to accommodate it, e.g. with some flights designed for pets or something, which I'm sure a lot of pet owners without medical needs would be delighted to pay for). If they want to discourage those passengers for the alleged good of the passengers, that's quite different.