Endurance is absolutely a great life skill. We can do so much more than we think we can when we learn how to manage our thoughts. It is what enables people to become navy seals, cardiologists, pioneers in one's field, or all of the above if you are Jonny Kim. Jonny spoke at great length on Jocko Willink's podcast if you are interested in his story of personal triumph: https://www.youtube.com/watch?v=yujP3-AxXsI