It does, because you can figure out how to make all this stuff work[1] without spending hundreds of billions of dollars going to Mars. You'll also probably discover that you don't actually want to establish a Mars colony.
[1] We don't actually know how to make it work. The Biosphere 2 project was a spectacular failure, and it operated with a much less difficult set of constraints.
[1] We don't actually know how to make it work. The Biosphere 2 project was a spectacular failure, and it operated with a much less difficult set of constraints.