I think that minimum redundancy is a wiser ethos. There are a couple of places where the weight penalty versus cost of failure makes the decision a no-brainer.

In my case, that means bringing aquatabs to back up my primary water treatment system and a second way to strike my stove. An extra 2 grams for aquatabs versus 4 weeks of greasy diarrhea? Check. Ten grams for a second mini bic or small fire steel versus cold soaking meals that I designed for cooking? Check.

But I do agree with you that bringing less in general frees you to move faster, go farther, and enjoy the journey even more.