Because in this case, it isn't related to just the one person who learns their lesson.
The easiest example is tuberculosis. 1.5 million people a year die of it. This isn't a minor disease. It is the leading cause of death from infectious disease (more deaths than ebola, malaria, HIV, etc). While TB is usually treatable, drug resistant forms are skyrocketing (even extensively drug resistant forms that basically have no known cure).
Tuberculosis is spread from person to person and from raw milk to people. One person can get TB from raw milk and then spread it to innocent bystanders. How would you like a family member to die because a friend of theirs was careless with raw milk? This isn't about stopping people from their own stupidity, it is about stopping their stupidity from killing others. TB was a major killer in the US (it once was the leading cause of death in the US above any other cause of death) and Europe until pasteurization came around.
Again, I'm not against raw milk (I have raw milk cheese in my fridge right now). But, we need to be very careful with it. These law makers (A) don't seem to know what they were getting into and (B) certainly seemed to be acting careless rather than careful. Stringent safety laws that allow raw milk products to be safely produced and sold are needed, not just a bill to legalize it with nothing to protect the innocent.
Dude, we have literally thousands of illegals with
human TB coming across our southern border every year. It's fairly ubiquitous among many poor, crowded populations with minimal access to modern health care, from where we get the vast majority of our illegals crossing the southern border. I highly doubt that raw milk with potential
bovine TB is a significant danger compared to that or even to other Mycobacteria. In any case, nodules encapsulating
Mycobacterium bovis obtained from drinking raw milk would be in the stomach's lymph nodes, NOT in the lungs as commonly seen in those infected with
Mycobacterium tuberculosis, so it's a very rare individual who would or could spread the disease to another human. The actual dairy farm workers would be a more likely vector via topical infections. Untreated,
Mycobacterium tuberculosis is a major (though slow) killer of humans, whereas
Mycobacterium bovis simply isn't. Even where the nodulization fails, a secondary infection with a faster growing bacterium is more like to kill than is bovine TB.
As far as regulations, I assume that a commercial farm producing raw milk in quantity would have to follow the same guidelines as pasteurized milk, less the pasteurization process.