Tbh, I think it can be helpful in figuring out what is going on with you. When you do things can be less scary and you might realize there is other people dealing with similar stuff.
And not even only with mental health but with physical sometimes. Idk why, but I haven't had best encounters with doctors and although I'm certain I had migraines as teen (all my family members were certain I had those too), I wasn't diagnosed for them. I did go to doctor and got CT scan to make sure it wasn't something acute. After that the doctor was just obsessed with my weight and didn't care I had bad migraines and would have needed some help to deal with them as they were scary as they were painful. Thank god I don't have those anymore.
I think doctors are helpful though to find out if sth you have is life threatening or if you need prescription medication. But in terms of diagnoses they can be hit and miss. You might have to go through many to get right diagnose and you at least know yourself better than bad doctor knows you- as they usually dont' even try to get to know you
