Ugh, that sucks. It's especially ridiculous since you said you were having obsessive thoughts "again"--it seems like it's not even a constant trait for you.

I can see why mental illness traits can be considered part of one's personality... much the same way a bone fracture is part of a bone or cardiac disease elements are part of your heart. In other words, that's no reason not to fix it.

I'm guessing he interpreted your description of the problem as some sort of low self-esteem issue and was trying to reassure you that there was nothing wrong with that trait. For some people, that might be appropriate. Still, regardless of his intentions, if the guy prescribing your meds can't understand your description of your symptoms, that's... bad.