Do you think you're a more capable, more resilient person for having had these experiences? Or the opposite - that they damaged you in some way?
Do you think that a teenager who perhaps has low confidence and poor mental health and who has never had the opportunity to test themselves would get something out of such an experience?
I'm not arguing for some kind of punishment or pointless mind-numbing labour for kids - I genuinely think that allowing kids to experience how resilient and resourceful they have the capacity to be is a great thing and that it can do wonders for confidence. If you've done something really hard, you can look at a different situation and think "this is not as hard as that, and I got through that ok".
I guess everyone has their own biases - personally, I have gained a lot of resilience through being in extreme/endurance situations and I do think others should be awarded the same opportunity to surprise themselves.