Is what we are building today becoming the reason for this depression ?
At the core, "having someone to talk to" would definitely help these depressions.
First, any society with lower stigma and better health care is going to diagnose more depression because more people will be evaluated.
Second, it's hard to track or categorize acute depression. We usually get data on chronic depression.
Third, depression is correlated with many conditions, such as poverty, physical injury, other mental illness, surviving abuse or war, etc. In some cases we don't know which is the cause and which is the effect.
I could go on and on. Weather, living as a sexual or racial minority, economic recession, being a caregiver, and almost every other life circumstance can be related to diagnosis of depression.
We just don't have any concrete answers that I've ever seen.
In this case it might be a tool for better understanding and application of the right human interaction as well. It seems the AI is used to find the right type of treatment and even catching circumstances that clinicians would have missed.
Also these numbers certainly don't account for preventative-proactive, non-medication treatment options that may allow for better neurotransmitter production - as the field of psychiatry, not being multi-disciplinary, doesn't care about such approaches.
And whether that's true or not that the origin is "too low of certain neurotransmitters" or that is a secondary effect of different origins isn't concluded in your statement or statistics.
Having been thru it, clinically, it’s not a shutdown of mental functions. It is more like a lens by which many of your thoughts have to pass through. Many of those neuronal pathways still function just as well as normal.