Disconnecting my success & my client’s success

I’m working on a model where I don’t feel “responsible” for my client’s success. Currently, I feel like if my program/service was better than my client would get the best results possible. Intellectually, I understand that they have their own model and that they are responsible for their outcomes.

But, I also believe that somehow since they are paying me for a service/course/program, that I am also responsible.

One bridge thought I had was “my success doesn’t have to do with their success.” which feels TRUE but also feels sort of snarky and not exactly the positive IM, I was hoping for.  Help to reframe?