Ditch the planet, let us have the wastelands, if they can’t just execute us first, or starve us to a more controllable population level. They want it to be them, and a small number of us to do the jobs they couldn’t or refuse to automate. This is the only answer that makes sense with everything they do. They aren’t stupid, they aren’t trying to destroy their own habitat, so their end game either doesn’t include us, or doesn’t include the planet entirely.
A fairly large percentage of straight people definitely have mental illness. Likely the same ones that will be saying the same thing about gay/trans.