If you don't think you can get to the root causes through shamanic healings practices, perhaps you haven't experience real shamanism. What do you think traditional cultures have used to heal their illnesses (physical, emotional, spiritual) for thousands of years? Therapy? Ayahuasca is what the locals in the Amazon use to heal trauma (among other things).

And as far as yoga and meditation, well if you follow ANY of these paths deeply enough you will come to great healing. Yes if meditation is something you do for 10 minutes to relax your body, it will have a very limited benefit. If you use it as a life-long practice to transform your consciousness, the results will be very different.

The issue is not the modality, it is the superficial orientation modern people have to them. frankly, it is just as superficial to say "ah, yoga is for new age putzes" as it is to be a naive new ager that thinks 1x/week yoga poses is going to heal their core wounds....