I worked in several photofinishing lab in the '70s and '80s, and spent 25 years in a motion picture laboratory. I witnessed a large difference in sensitivity
to photo chemicals. One senior processing operator would think nothing of putting his hands in developers without protection. He did this for over 30 yers without any problems. Another processor had to be moved to another department when he could no longer enter the dark end of the ECP processor without breaking into a rash. We had a chemical mixer who refused to wear gloves and respirator, who didn't last one year before getting dermatitis.
People do have wery different sensitivities to these chemicals, but my point is that you do not want to discover if you are one of those with high sensitivity. It is better to take precautions from the very beginning and never find out.