Why do you think are there so many transvestites in Thailand?

A friend from Thailand once told me that these individuals do it mainly to provide income for their family and since there is a "demand" for transvestites, they would opt going through surgery and medications to bring out the feminine side. Most surgeries include implants, removal of adam's apple, facial augmentations, and on some occasions, removal of the male organs. They then take medications such as estrogen to lower male hormones.