It's not their fault.
Of course its not their fault and what happened wasn't necessarily a bad thing. From what you have divulged it was essential to ensure you had a future.
what's the harm in that?
Maybe there will be none. I'm just saying be careful. This sort of thing is life changing and potentially harmful. It's something that needs very careful consideration and shouldn't be done through selfish desire. Remember you are playing with someone else's emotions and psyche that probably doesn't even know you. I'm just putting an alternative view forward. I don't know the full details and you shouldn't make them public.
I'll give you an example from my past. I grew up believing I was born at Birminhgham childrens hospital. That was fine by me. I didn't need to know anymore although I did on rare occasions think about this. I was 31 when my first child was born. The day I registered his birth was a life changer and upset several peoples lives. I was asked where I was born and on replying I was told it was impossible as there was never a maternity unit at Birmingham childrens. My nose was pretty much put out of joint and a big argument ensued at the registrars. An even bigger argument occurred when I confronted my adoptive parents which resulted in us not talking for 3 years which now I sincerely regret. They lied to me but they had a very good reason to do so. It was for my protection as a young child. It took me 3 years to really understand and even now typing this I'm trying to think of an alternative method they could have used. I can't.
So thats something that in most peoples mind is something pretty small, but this had a significant effect on me and my adoptive parents.
I don't normally advocate the use of psychologists but in a situation like yours I would recommend a couple of sessions to open your mind to the possibilities. How many people through history have believed they were doing good unto others and caused the opposite?
Be careful.