It is not accurate or fair to say that women should avoid "nice guys" in general. Being kind, respectful, and considerate are positive qualities that many women value in a partner.
However, sometimes when people use the term "nice guy," they are referring to a specific type of person who may exhibit certain negative traits and behaviors. These so-called "nice guys" may be overly passive or submissive, lacking in confidence, and may use their kindness as a manipulative tool to gain women's attention or affection.
It's important for women (and anyone seeking a partner) to be aware of these negative traits and behaviors and to avoid entering into relationships with people who exhibit them. In general, it's a good idea to seek out partners who are genuine, honest, respectful, and emotionally mature, rather than those who use manipulation or other negative tactics to try to win affection.