I don't know anyone who is turning to therapy for 'trivial' reasons like a bad week at work!
This is made up rationalisation in your head (for an essay/article?)
I do think therapy doesn't suit every problem and not everyone benefits. In our family, though, private therapy to help people struggling acutely has been very beneficial, when the state literally offers nothing.
The biggest problem for teens and children is not getting therapy, it's not getting any treatment at all, getting discharged or unable to access CAMHS, and once they get desperate and take overdoses, for example, then private therapy won't take them as they are too high risk. Private therapy tends to prefer 'easier' problems and teens with more risky mental health issues, who would benefit from proper psychiatric and psychological intervention don't get it, and there's very little in the private sector that will address that. Same for autistic or LD teens, harder to get someone to take you on, but a great person specialising in ND can be life-changing.
Not enough therapy of appropriate kinds, lots of talking therapy for milder problems.