You need a dominant sex hormone. That practically means you either transition and take estrogen to mimic the hormonal profile of a female, or you keep androgens as your dominant sex hormone. If you have mild hair loss, the latter is your best bet toward living a normal life as a male. Without a dominant sex hormone you are sure to suffer from bone loss and have a constant strong feeling of unwellness. Only way I could see a man benefiting from estrogen is that if he is balding so rapidly that he is becoming suicidal. Even then, you can be assured that your quality of life will change. If you gain hair back, it may prevent you from committing suicide. But keep in mind you will sacrifice the drive, mindset, energy, and sexual abilities of a normal man. HRT will chemically alter you to a feminine, sensitive, and delicate nature (not just psychologically but also physically), as well as inhibit your ability to reproduce. For some they feel that this trade off is worth it, or at the least better than entering the casket prematurely. It is amazing how little people understand about this subject when there are thousands of pages on this site (as well as the entire internet) dedicated to discussing this very subject.