This was my exact initial fear in theory but it doesn't work out that way in practice. Children are forced to learn a musical instrument and it takes away their sense of agency. They will hate both the instrument and the parent. This makes sense.

Here. In this case the situation is different. Both the parent and the child is the same person. In my case I was pretty excited because finally I found something that worked and resolved my issues. Once the feeling of accomplishment sets in you will feel pretty happy. Once your mind knows that there is no way out it starts adapting and starts assisting you. That's why the contract should be irreversible.