Final answer:
The concern about caring for the aliens stems from the fear of having to change the human world for them, reflecting historical and modern debates on colonization, environmental impact, and space exploration.
Step-by-step explanation:
People are concerned about caring for the aliens in "The Wretched and the Beautiful" because they fear the need to change their world to accommodate the aliens. These concerns parallel historical thoughts on human interaction with new and different entities or societies, such as the debates about colonization and its impact on both the colonizers and the indigenous peoples. Modern considerations regarding the ethics of human environmental impact, as well as the potential colonization of other planetary bodies, reflect similar dilemmas about altering one's lifestyle or world in the face of new influences or requirements.