Lmao... Whatever their stance may be, they will still have to feed their baby milk for so long, whether they like it or not.
At the end of the day, the choice all boils down to if you want to feed the child on something that contains cow's milk or if you want to use a product of your own body.
You won't have baby for long if you try to feed it vegetable juice.
Veganism is about not exploiting animals for our simple pleasures. It isn't about babies consuming what the females of our very own species produces to nourish and sustain them and that mothers give freely to their babies. Now if women were forced to live on a factory farm walking around in their own shit all day, forced to eat unnatural foods and being pumped full of antibiotics and hormones, suffering from birth until death, just so you can enjoy a bowl of ice cream...then yeah... I would have a problem with it .
Also, that smart phone or computer you're using to read this that is primarily made out of plastic, contains chemicals known as "slip agents" which are derived from the stearic acid in animal fat...