[mech765]

As an example: there are genuine cases of masochists that are subjectively happier because pain is being inflicted on them. In many of these cases no serious harm is done to their body. Your claim "you can't trust their reported state" is either 1) a claim that the outside observer knows better than the individual what their subjective state is or 2) that the health of the subject is more important than their subjective happiness.

If you are arguing for #1, I disagree. If you are arguing for #2, you should be more clear about why/how you keep using the word "objectively".