And are we designed for space travel? Clearly no.
But how much can we do without the complex ecosystem is the question. Scientists and engineers can offer solutions. Maybe humans will have to be modified in some way?
I like to use the analogy of traveling with the wife - do you really need that industrial sized hair dryer? Do you need the three jumbo sized suitcases? No doubt scientists are considering this. But maybe the need to completely rethink it.
There are many aspects of a human being that we don’t even understand yet. Maybe subtle things like the earth’s mag field are necessary.
Perhaps a more useful question is "Are we designed with wanderlust?" Clearly yes.
Look how quickly we spread from the Bering Straight land bridge to Terra del Fuego. On foot.