Not just that, but there's a very wide, gray area in our other domestication stories too.

You don't just rock up to a herd of wild bovines and say "hey, you're my cows now, let me milk you". Rather, one day a group of humans started following a herd around, killing one once in a while for meat; eventually perhaps they started protecting the cattle from other predators and guiding where the herd went, while also starting to find ways to continue lactation in females and get them to acquiesce to being milked.

The cows that were compliant to the slow changes were the most likely to reproduce; rinse and repeat until you get whatever we have now.