I see this rhetoric every time this subject is brought up. Keep on believing there is something wrong with you. Keep paying your pharmacy to supply you with SSRIs to "fix" your brain. Sounds really healthy.
However, I know what depression feels like, and how different that is from sadness.
And it seems like you're telling me that I've never experienced "true" depression. You have absolutely no basis for that 1.) because you don't know me 2.) because our perceptions of reality are unique.