I don't think overuse of therapy is a problem at least in Finland. Psychotherapy is very expensive. Depending on what the qualifications of the therapist are, I imagine it would cost between €100 and €150 per hour. Intensive psychotherapy involving, say, three hour-long sessions a week and lasting, say, a year could cost up to 523€150 = €23,400. Not many people are willing to cough up that kind of money out of their own pocket without a real need. KELA (the national Social Insurance Institution) does not cover any costs without medical necessity. It's more likely that there are more people who would benefit from psychotherapy than there is money to cover the costs.
There is no culture of having a personal shrink in this country. I don't know if it's a thing even the US. But nothing like the phrase "My shrink says..." exists in common parlance here. I would imagine psychotherapy is even less common in poorer countries. It's bit of a taboo thing here and from what I've heard even moreso in southern Europe.
I think many people in Finland will benefit, but they are rarely the ones who have the opportunity to go. However, many people in Finland would also benefit from an enriched social experience too, which is much cheaper and doesn't require a specialist to organize. I think that a lot of help in life is much more accessible than a psychotherapist, but everyone is hoping for the 7-minute ab workout to health of all kinds.
Nothing wrong with socializing when it is desired.
Finland and every other country this far north has a long history of its people being forced to live in uncomfortably close quarters for months on end during the cold season in incredibly cramped conditions. 150 years ago most children didn't even have shoes of their own. Imagine being forced to sit around in a small cabin with very poor air quality from the smoke from the stove together with a family of 6-12 members for months in a row. The kids couldn't go out to play for too long because you'd have to start amputating toes before long.
I think the appreciation for personal space is deeply ingrained in the culture because of that reason.
Nothing wrong with alcohol when it is desired.
The problem is, desires aren't a very good indicator of whether something is or isn't healthy. Not desiring vegetables doesn't mean they aren't good for you to eat. Cultural conditioning to make social interaction undesirable doesn't mean that it is good to follow the culture. Culture itself causes a lot of problems in this world, so I don't rely on ingrained culture to bring about good outcomes for individuals or societies. If anything, I think people should heavily review their culture and see how much of it is harmful - and then attempt to change behaviors.