Which is probably even true, considering that Genesis was never credited with the ability to create planets.
Marcus: "What if someone had transplanted us when we were pre-animate microbes?"
Now that would
make Marcus sound like the sort of tree-hugger who orders the hunt for perfect desert worlds not because "contaminated" planets would ruin the validity of her precious experiment, but because "contaminated" planets are sacred. I'm sort of relieved that the line isn't in the actual movie, because nothing the Marcuses did for a living was indicative of a desire to preserve existing things!