It can be related to climate, genetics, or other diseases that a person has. Women also have a higher likelihood of developing dry eye due to hormonal effect on the glands' production. Lower humidity environments make the tear film evaporate more quickly, so even someone who hasn't ever felt dry eye may not be able to move to a dry climate without feeling it.

https://pubmed.ncbi.nlm.nih.gov/19115918/

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7401914/