I think she's being overly optimistic; excuses are not always excuses and could be valid concerns. If you go to a gender therapist, and they tell you that it is going to be extremely challenging for you to physically transition; are you going to keep seeing that therapist, or would you rather go to a gender therapist who tells you that you can absolutely transition, and that HRT will take care of everything (just keep the faith for seven years and keep seeing me).