The human body is not a wooden puppet that requires an external manipulator to produce its movements, speech, intelligence, and decisions. It is autonomous for all reasonable purposes.
Just stop being an incompatibilist, or accepting that kind of requirement for free will. Why in the world would you want to behave randomly (devoid of internal regulation), as a severely insane person does?
You want your somewhat predictable choices and inclinations, as long as they are not destroying your life or others. And if they are, accepting the concept of free will enables you to change them, whereas someone who regards themselves as fatalistically locked in their current programming will not do so.
And the extreme view of requiring control over all your own origins in order for there to be free will is incoherent. The idea that you could "have been someone or something else" or that you could "have been an alternative version of yourself with different memories and routines" -- neither of those is possible. Since you would thereby cease to exist physically or psychologically (respectively) if you were someone other than who you are. You can't choose to be replaced before you exist, and if you could replace yourself afterwards you simply cease to exist. Someone else (either physically or psychologically) can't be you, since that entails different individuals.
That kind of metaphysical requirement -- in order for free will to be applicable -- is likewise designed to be dead the instant it leaves the starting gate.
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