Don't be so sure.
On October 30, 1924, Midgley participated in a press conference to demonstrate the apparent safety of TEL. In this demonstration, he poured TEL over his hands, then placed a bottle of the chemical under his nose and inhaled its vapor for sixty seconds, declaring that he could do this every day without succumbing to any problems whatsoever. [...] Midgley sought treatment for lead poisoning in Europe a few months after his demonstration at the press conference.
Same person later invented CFCs.