The issue of disease is still not addressed, because many women and men will are left with broken bodies and destroyed psyches from his practice.
In my youth, I worked on some large industrial construction projects. Unitl laws were passed that penalized employers for promoting unsafe construction practices broken bodies were a not uncommon practice. You will always have accidents because construction is a risky business, but now the industry is safer than it used to be.
You cannot regulate the safety practices of an illegal business, in fact making it illegal just raises the risk for the workers. Legal business can provide insurance, retirement and other benefits for their workers. Illegal businesses cannot.