Ross Pomeroy's points are expanded in great detail by Kelly and Zach Weinersmith in their book "A City on Mars" with subtitle "Can We Settle Space, Should We Settle Space, and Have We Really Thought This Through?", Penguin Press, NY, 2023.
The authors go well beyond the technical challenges and environmental hazards to include space law and much else. Their research is impeccable. They conclude that Mars and the Moon are impractical and terrible places to colonize, at least with current technology. The Weinersmiths do not denigrate the aspiration to do so, however.