This phenomenon is called "Solomon’s Paradox" - People think more clearly about other people’s problems than their own. When facing their own issues, they reason less rationally.

Yet, a study from 2014 showed that seeing your own problem from an outsider view removes the gap between how wisely you think about yourself and how wisely you think about others.

[1] https://pubmed.ncbi.nlm.nih.gov/24916084/