I hadn't noticed how flexible I tend to be regarding uncertainty, and how much of that is due to my upbringing. Don't get me wrong: I don't like knowing whether my plans will work either, but I don't let it worry me, since I'm too busy doing those things I can actually do.
Maybe it has to do with growing up in a society where not everything is provided "as is", and you have to learn to improvise as you go. The problem with Mexicans is that they (we) tend to improvise too much, while others are much more inflexible.
Makes things interesting, that's for sure.