Gender

[Bucky Ball]

Yes, I am aware of all of this I'm simply pointing out the pragmatic real-world fact that real mental issues in the real world don't fit into such a nice clear model psychology is messy.

You wrote this

"That's absurd we rely on self-reporting to huge degree and there are no universal symptoms of depression there are guidelines but those are not gospel. One mans depression is not another mans depression. Also when comes to gender i doubt any such test can exist there are to many factors to gender to make such test reliable or meaningful gender identity is a personnel identity that is based on the individual and their definitions of what they mean when they use it and their is noting in science that contradicts this."

There may not be "universal symptoms" but there are symptoms that are very common, which according to the research I provided, track fairy accurately the diagnosis.

It's not the only way a provider looks at the problem. It asks about the common symptoms people with depression has, that many do not associate with depression. 
Patients are known in that field to present within a Bell distribution with certain symptoms. Of course there will be *some* outliers. 
The symptoms asked about in the PHQ-9 are not a "nice clear" anything. It's based on expert knowledge of how patients present, with a possibility of 262144 (I think) possible combinations. 
The fact it's required all over the country tell me a lot of providers find it useful. There are not an "infinite" number of possibles. It's not the ONLY thing in a visit the provider uses. 
What would YOU add to the tool or what do you want them to do ?