Sexuality

I think that was his point. No one said they had a problem so he ended his first comment the way he did saying if your ok with it, then there's no problem.

Perhaps :-)

Read the original comment

The point is actually the commentator believes they have the expertise and professional credentials to diagnose people's problems.

That person assumes they're accurate, because of these credentials.

One should never assume that, they're not superior to anyone else. And one should never assume because they have these professional qualifications and experiences - that they know for definite, how individuals feel in regards to their sexuality.

Being a Psychologist is a specialism. But the person behind the Psychologist, determines what sort of practitioner they'll be.

By this person stating there credentials, they're implying they're the experts and whatever they state is accurate and not without doubts, because they're deemed the professionals in human psychology.
The person didn't have to state any credentials, but did so to seem more credible a person.