Your therapist is partially right, but it's not so much that there is nothing to look forward to as it is a change in your hormones and psychology. People go into this with a particular mindset of having great expectations of what they are going to do and how different life is going to be but, what they fail to realize is that, sometimes things don't pan out as planned.
There are a lot of changes taking place during the first year and you are also chained to your dilators and maintenance routine--this gives you a lot of time to think. Sometimes things go wrong and sometimes the healing takes longer than expected. Sometimes the swelling and puffiness could go well beyond the 12 month mark--I know someone who is into her 16th month and is still healing. Also, many people who knew you before surgery will still see you as the person before your surgery. You can have ten vaginas and they will still see you the same. My surgery partner is a prime example of a very beautiful trans woman who is experiencing this. She is a runway model who travels the world and people still see her as a ->-bleeped-<-. One, because of her voice and two, because her hands and feet are a dead giveaway.
Many of us also go into this thinking that we are going to bang the world--some do and some don't. I'm one of those who said and thought that way but didn't go that way. My areas of concern have shifted more toward becoming a better woman--self-improvement. I am now considering having some face work done and, for the first time in my life, I am now becoming braver in trying out new hairstyles and doing things I would have never dreamed of doing before. I could really care less about banging anybody--I want to be respected, not seen and treated as some skank.
There are a lot of things to prepare yourself for when you have srs that go well beyond the physical. This is more that just a goal we set for ourselves, this is an incredible life change. You have to be prepared for the worst possible outcome while envisioning the best possible result. If you go into it thinking that everything is going to be so much better, then you may be in for a letdown which can lead to severe depression.
I wish you all the best with your surgery.