In the US im guessing we like it because the cost in terms of healthcare fees and social stigma is likely a high enough bar to entry that people find amateur help more accessible. Mental health in the US has a sad stigma. men are supposed to be rocks of silence and discipline, women are supposed to be strong and independent, we really leave little room for variance.
as for "the shop rate" its exactly why my neighbor asks me about his car when Im picking mint from the herb garden and not while im swinging deadblow hammers in the shop. $70-$120 an hour really puts a damper on your ability to get help any other way. I guess psychiatrists charge way more, but if insurance never chips in, I guess chamomile tea and dear dotty columns are the next best thing. But these arent scientific and they certainly dont help.
Just like pouring gallons of engine repair snakeoil in the crank case. Its something, its just not going to fix the problem. It will let you ignore it long enough until it becomes a blown head. or i guess in the case of mental health, a meltdown in a crowded office or something that comes with an assault charge and a rap sheet.