Can you convince someone to buy-in to safety without management being on-board? Of course you can. It’s not impossible. It’s just harder.
I have deep convictions for safety. It doesn’t matter to me what others think about my safety values. I will do what I want as long as it keeps me and those around me safe. I have been scolded and chastised to just relax when it comes to safety. I turn a deaf ear to that suggestion. I drink the Kool-Aid. I have bought in. And honestly, my convictions for safety don’t change based on whom I work with. Some companies hire me to consult about improving their safety meetings. Others hire me to speak on personal leadership in safety. My values on safety stay the same.