We’re on the same side; but I’m unwilling to postulate that hostile aliens are a complete impossibility, nor am I willing to commit to a MAD policy towards earthly nation-state orbital aggression (although I have to admit mutual assured destruction worked pretty well for a long time down here). So we’re just arguing about the best place to put space habitats, not whether to build them or not. We’ve ended up talking about military considerations because that’s where we’re most distinctly different in outlook.
I agree with Elon Musk; go forth with big goals. Spread the species far enough that we aren’t all a single asteroid away from extinction.