The question why would I need to do that? Btw. no, this is not how OOP works. With the method I outlayed I have very easy time to achieve idempotency, the thin

The question why would I need to do that? Btw. no, this is not how OOP works. With the method I outlayed I have very easy time to achieve idempotency, the thing you suggested makes it harder because the objects have internal state and the method calls can depend on those.