We legislate safety courses for truck drivers, safety belts for all drivers, car seats for children, sterile bandaids in hospitals and clinics, gloves for food service workers, and numerous other safety and hygienic precautions.  Why do you think it would not be in the public interest to ensure the health and well-being of actors?

Be thankful that OSHA has not taken action… yet.  As new professions move into the mainstream it becomes the function of the government to regulate their actions and behaviors to prevent injury and the spread of disease.  How can you argue with that?

Secondly, I’d hazard a guess that if adults were allowed to create a business agreement with other adults, the caliber of people doing this would improve because you wouldn’t be handing a monopoly on it to the black market.  The reason scum runs prostitution rings is because we’ve driven the business into their hands and guaranteed them no competition except for each other (and don’t even get me started on the street violence doing that has created).