There are good ideas in the field, to be sure. But on the other hand...
I can speak from a lot of experience when I say I would trust a clinical psychologist over a psychiatrist any day of the week. Psychiatrists are just doctors who learn to prescribe medication based on a simple set of rules and psychometry. There are psychiatrists who take their field very seriously, but that's the exception rather than the rule.
It's basically impossible to separate the benefits of talk (social interaction, validation, etc) from the talk therapy. Lots of people whould probably be served just as well if they had someone much less trained, or not even trained at all to talk to in a similar manner.
Furthermore as the social bonds disintegrate studies suggest that individuals have less friends and less interpersonal interaction generally (social media use excluded) at the same time the need for psychologists has increased. In some demographics over half the members have been diagnosed with a mental illness. How can we be sure that all of the sudden lots of people have become mentally ill vs lots of people need someone to listen to them?
This goes especially for actually severe mental disorder, because the thing there is, those patients have things going on in their head that most people can't relate to or understand(like irrational fears for instance). Psychologists however have a lot of experience talking with these people, reading and interpreting abnormal body language. And they know the sort of things you definitely don't want to say to a patient.
As for your point about social media, my personal view is that you're mostly right except I do think real mental illness is increasing, because loneliness is such a strong cause of depression especially, but also social phobia.
Throughout my childhood most of my interactions with people outside my family consisted or bullying by other kids and neglect by teachers. Because of this, it's deeply instilled in me that in any social interaction people are catalogueing my every mistake or negative attribute, or just ignoring me. No amount of conversation with other people(or medication btw) has helped me overcome this, but the only progress I have made was in therapy. What I really needed was help to understand why my brain works this way, and how I can be more aware of my own irrational thinking. This has helped me to obsess a lot less about social situations. Though I still have a deep mistrust of people at my core, I've at least been able to let some people in and learn to trust them. And accept that they really do like me for who I am.
While a bit rambling, I hope that provides some context on what a good therapist can do compared to speaking to friends and loved ones.
For young men without strong male influences in particular I think a kind person in some sort of big brother program is probably worth a team of psychological professionals in many cases.
But we need to recognise that actually, there are people who can't be helped this way, who need more than just any talk at all, and that clinical psychologists have a lot of useful expertise on how to help these people, that can't simply be written off as unscientific or just a friendly conversation. There's a lot more to it than that.
This is without a doubt one of the worst and most normalized human rights violations happening in the world today, and the scale and impact of it is hard to imagine.
The police then take that person to a place of safety, usually a hospital.