I choose not to use chemicals that pose what I perceive to be a risk.
All chemicals pose a risk. It is just a matter of balancing the gains from the downside. As I said, I know more people who have had a problem with metol that can cause a severe skin rash.
Staining developers seem to create an intense emotional reaction among some people. In these cases it is sometimes with those who have a negative reaction but who have never tried one. Would it make you a better photographer, who knows.