Having watched a lot of Chemical Safety and Hazard Investigation Board videos* i am a bit doubtful of that statement. Do you have firsthand knowledge here?
*Amazing videos, can really recommend them. https://www.youtube.com/@USCSB/videos
*Amazing videos, can really recommend them. https://www.youtube.com/@USCSB/videos
The real problem is that there are about 2000 OSHA inspectors in the country, working out of about 100 offices, and serving more than 100 million workers.
About half of the states have their own OSHA organizations, but I don't know much about how effective they are. In the northeast where I grew up most of the state-run OSHA orgs only dealt with state/county/city government jobs and left private employers to Federal OSHA.