Hmm. It's more like someone comes back from a long wilderness trip or a hike through Europe and they go on and say "I've learned that you don't need 30 kg of luggage". Or someone who's built a good relationship saying "I've learned you can choose not to be jealous or dependent".

I've seen all four combinations of frantic/measured and smart/stupid startups, and I think that measured + smart is the way to go. But I also think that this is one of those lessons you have to learn from experience.