what is wrong with the statement "you look exactly like your mother"

Was the girl cloned? Otherwise it is not exact.

You might have different traits

The problem with the statement "you look exactly like your mother" is that it assumes that looking like someone is an objective measure. However, physical appearance and resemblance are subjective and can vary from person to person. What one person considers a strong resemblance, someone else may not. It's important to remember that everyone has their unique features and characteristics, even if they share some similarities with their family members.

To understand why this statement can be problematic, it's crucial to consider individual identities and the possibility of it being a sensitive topic for some people. For example, someone might not want to be compared to their mother or feel pressured to conform to certain beauty standards or expectations.

In general, it's always better to be more mindful and considerate when making comments about someone's appearance and respect their individuality.