Constantly seeking external validation before making decisions can have several drawbacks. Firstly, it can erode self-confidence and autonomy as individuals become overly reliant on others' opinions rather than trusting their own judgment. This reliance on external validation may also lead to indecisiveness, as individuals struggle to make choices without input from others. Additionally, seeking validation from others opens the door for biases and influences that may not align with one's best interests or values, potentially leading to regrettable decisions based on external pressures rather than internal convictions.