I don’t agree with this statement. Pretending to be someone you aren’t does not mean you are a weak person. In a lot of cases, people need to pretend to be something they aren’t for survival and safety. Taking on something that you actually aren’t isn’t a sign of weakness in any way, if anything it can be the opposite. It takes someone very strong not to crack under the pressure of a keeping up a façade.
On the subject of safety, hiding behind a mask can protect someone, as sometimes being open about who you are is unfortunately dangerous. In places where your belief, sexuality, gender identity ect. might not be accepted you could be punished or hurt for who you truly are. It is always important to take care of yourself and who you love and care for and calling someone weak because they either choose, or are forced to hide things about themselves in order to survive is not fair.
I understand that this statement is trying to take the viewpoint of someone saying that “You should always be true to yourself!” and that is a beautiful sentiment, but unfortunately it cannot always be applied, depending on someone’s individual situation and privilege.
Being strong and brave enough to protect others you love as well as yourself however you can should never be viewed as something that weakens you.