If you want to argue that cow milk is not good for humans then please do so, but simply stating that cow milk is intended for baby cows does not imply that it is bad for humans.
Your argument is invalid. You may still be right that cow milk is bad for humans, but that particular argument does nothing to prove your point.
People will do what ever they want to justify their diet. I honestly don't care if people agree with me about cows milk. I can tell some are reacting more offensively because they love cows milk more than understanding the argument being made.
A huge portion of the population have alergeis associated with dairy products. You don't think this has anything to do with it? Not only that but some of these effects are not actually attributed to milk drinking. When some cows are over milked or milked too often they can develop infections which go into the milk itself.
The blood and puss in the milk directly effect the human immune system causing phlegm allergies. The reason why is because the body considering this infection to now be a human infection so the immune system goes into action which results in an increase in phlegm.