Hi, thanks for the question!
The post was referring to all the alternatives to cow’s milk because
cow’s milk is very unethical. For a cow to produce milk she must be
pregnant; this is done by artificial insemination, and when she does
have her baby, if they are a boy he is killed for veal and if she has a
girl she becomes a dairy cow like her mother and the cycle continues.
This happens multiple times until she is unable to have any more children,
then she is killed for meat.
Cow’s milk is designed for a baby cow and there is no reasons for human to drink it.
If you want to know more, Earthlings and Forks over Knives are both really good.
And non dairy milks taste better :)