A) A phrase that seems to simply state the obvious but actually implies helplessness. B) A phrase that seems to simply state the obvious but actually means it will be what it is, as in it ain't gonna change, so deal with it or don't.. See also tough shit, oh well, cry me a river and tfb.
Find and run to your nearest escape route, whether it's behind a fence, a tree (one she cannot knock down), a large bale, a tractor or truck, anything that is large enough that will protect you and act as a barrier between you and that cow.
So yes, if the cows are not milked, it is detrimental for them. Physical ramifications aside however, this argument is problematic for several reasons. In essence, this argument is saying that if the cows are not milked, they will suffer detrimental effects. Animal use however, is inherently detrimental.