Is Changing Yourself a Bad Thing?

I consider my identity to be entangled with attism. In so removing the atism is removing a piece of you, right? Plake, philosophically, and somewhat non scientifically speaking, like our consciousness is our brain, right? We could argue that the structure of our brain plays a large role in our consciousness. To change that neralogical component would be to change myself, yes. So then my next question is, is changing yourself a bad thing? There is a difference between changing yourself into plasticity and cheasing key components of your identity? Ah, and in that i can't think of a good example right now. I don't think i'm equipped to really have that