good ideas emerge later in brainstorming because they are less obvious. If something seems obvious to you, it is probably obvious to others, and there are likely good reasons why incumbents remain unbeaten or the problem unsolved.
It’ll be awesome to live a long and healthy life, but the purpose of life isn’t to have as much of it as possible. The purpose is to know what to do with what you have. Without something worthy of dying for (dedicating yourself to), you can live 900 lifetimes and still feel like it’s not long enough.3