It's just an interpretation that fits with observation and the feeling of will. What kind of an infinitely strange coincidence would it be that the universe so happens to give a feeling of free will and a behavior of matter that when uninhibited coincides with the intention. It would be like saying the relationship between gravity and matter might be a coincidence. Sure it is possible that gravity and matter just so happen to exist in such a way that makes them appear to be causally connected in some way; similarly, it is also possible that the feeling of intention is a ridiculous coincidence to the expected observations.What you say makes no sense. It doesn't matter how it appear to an observer, the observer has no access to the relevant information, the observer does know your inner workings, only superficial appearances. If you, yourself have no regulative control of your makeup, Quantum states, particle position and consequently what happens to you, you are not free. You are a puppet to underlying forces over which you have no regulative control.
I know that I don't have proof, but I also know that I have not come across any reason why limited free will can't or even shouldn't exist.
What a ridiculus brainfart!