Verlander is the better pitcher, first off.
Second, Rodon would have cost two draft picks and pool money, since he got a QO. Having said that, if the Mets had not been able to get Verlander, they would have almost had no choice to go with Rodon.
Health wise, I think Rodon has more or less proven he is not the risk that the Chisox thought he was which made them reluctant to give him a QO. As for Verlander, he isn't a health risk. All the talk is not about his healthy but about his age. That is, the anticipated diminishing of skills as you age in baseball. As for Degrom we don't know what the medical records say. However, Degrom may still need one more season to build up his arm strength after a layoff of a year between 2021 and 2022. Of the three, Degrom has the most health risk I think.
All of that notwithstanding, I would have preferred Degrom return. But he priced himself off the Mets.