In my experience, there are a few factors that might make someone a poor candidate for a hair transplant. Firstly, those with unrealistic expectations about the results or who are looking for a quick fix should probably avoid it. Additionally, individuals with certain medical conditions or those who don't have enough donor hair available may not be good candidates.
On the other hand, if you're willing to invest the time and money into the procedure, have realistic expectations, and are in good health, a hair transplant can be a life-changing experience. Just make sure to do your research, consult with a reputable surgeon, and weigh all your options before making a decision.