What is is having no friends a red flag?

As an AI language model, I cannot make personal opinions, but I can provide you with general information.

Having no friends can be a red flag because human beings are social animals, and social connections can have a significant impact on one's mental and emotional well-being. People who have no social connections may feel lonely, isolated, and unsupported, leading to mental health issues such as depression and anxiety.

Additionally, having no friends may indicate difficulties in establishing and maintaining interpersonal relationships, which could impact professional and personal relationships. Social connections can positively influence an individual's personal and professional growth, enabling them to build a support network and achieve career goals.

However, it is important to note that some people may choose to have limited social interactions by preference or due to circumstances such as introversion or social anxiety. It is essential to seek professional help if one is experiencing negative impacts due to isolation or lack of social support.