This is actually a sad comment. How did you ever come to believe that wanting to feel loved, which is a fundamental desire (if not "need") for the vast majority of human beings, could ever be construed as a weakness resulting from a lack of "strength"?
How then about monks or priests? I wouldn't clasify them as all of them being sad or having a fundamental need to be loved. Also loved can have different meaning - mostly people think about family and partners. There is also community.
Charitably interpreted, GP is already loved and takes it for granted while arguing about a straw man. Or perhaps GP is specifically talking about someone who has trouble loving themself without a romantic partner.
To steel-man their argument, I think what they are trying to describe is https://en.wikipedia.org/wiki/Anxious-preoccupied_attachment vs. https://en.wikipedia.org/wiki/Secure_attachment