He may have some regrets, that’s understandable. But look, he invented a tool. He moved human knowledge ahead and inspired much further research. The real fruit of human hormone research will be coming within most of our lifetimes, I think, and it will be good. His work was critical to it.
He should be happy with his work, it was a blessing to all — even if it was disruptive, that was not his account.
Except for the babies who ended up being aborted as a result of it or the women who suffered from the adverse side effects; stroke, heart attack, cancer, etc.
If you characterize that as a blessing you have your head up your dirt chute.