Single vs. Married

I started to understand why a counselor is better as a marriage person with husband/wife and kids. Single people cannot relate to married people and parents.
To be honest, I can’t sympathize with a mother who’s exhausted all the time, feel that her life is for her children, etc. As much as I want to understand, I still can’t. On the extreme side, married people think they know about single people because they were once single.