Raw milk actually has a decent shelf-life, like you would expect milk to have. The problem is regulations heavily target raw milk dairies. While regular dairies can send their milk off to processing plants, most raw milk dairies have to swallow the expense of building their own bottling plants and have to rely on distribution methods such as people driving to the dairy itself to purchase it or shipping loads to co-ops.

It is outright illegal to sell raw milk in many states. It is safe, even according to government tests, but it would give competition to mega-dairies. Also, imagine if people could potentially, on their own, get enough to do a milk-diet for a month and possibly be healed from things like diabetes that otherwise requires a lifetime of medication. Who would lose out in that situation?