Free range or not, cows still need to be artificially inseminated (read: industry term to fancy dress "cow rape"), the calves still need to be weaned off after only a few weeks with their mothers (once the colostrum part is over) and/or be given formula milk substitute while humans drink what's rightfully the calf's. Leaving the calf with the cow is absolutely not profitable. Also, the mother cow needs to be culled after only 5-6 years of living because they cannot bear children after that; cows naturally live for up to 20 years. Free range cows still end up in the same slaughter house, so you're indirectly funding the beef industry. Oh, and by the way, if the calf is a male, it's killed right away or sold to the veal industry.
It's disgusting and cruel regardless of how much space the cow had to roam in; every other aspect of its life was miserable. Not knowing this is okay, but if you're reading this and the sibling comments, you really have no excuse any more.