In reply to upupup:
Great post and thanks for sharing. Regarding your observations about climbing as an activity for managing mental health, definitely! I agree wholeheartedly and I imagine I speak for many others too, it's an amazing way of spending time and has an endless number of benefits.
I wouldn't say climbing is unique as an activity which brings those benefits though, people can enter a flow-state, enjoy the focus and the resulting positive effects by doing almost anything. Think of common hobbies and interests like running, cycling, flying to name only a few. Also other non-physical activities like building or creating something, fixing a car, cooking a meal or even washing the dishes. I think one of the most common reasons for being passionate about an activity is for the benefits to a person's well-being.
On the other hand, often these activities can be used for escapism and a distraction from thoughts and issues which aren't being dealt with. Being able to take your mind of things is great if you struggle otherwise, finding an activity which does that for you is often the hardest bit. But it can easily be problematic when issues like dependency, risk taking, compulsiveness rear their ugly head.
Your stance on risk taking is healthy and normal, and it's easy to think that less risky climbing styles won't give you the same buzz. Do you do much sport climbing? There is a lot to be said for pulling moves and sequences at your limit safely on sport climbs and boulder problems. Trad climbing tends to be less at-the-limit and more conservative with difficulty. But there are so many safe trad routes which can push you to that limit which gives you a huge mental workout and brings many if not all and more of the same mental benefits the bold climbing does for you now.
Just my 2c...