If people had no free will to chose, who would tell them...for example what their favorite color is? What their favorite food is?
Who told you what your favorite color and foods are?
if we are preprogrammed, we are nothing more than a robot who has had it choices programmed in to it.
And that would be bad why? It sounds like a good deal if it were possible to program people to want what is good and right. I would have done that with my own children had I had the powers of a god. Instead, I had to find ways to persuade them not to lie, cheat, steal, etc.. That's not a choice I would want them to make.
Incidentally, supposing it were the case that free will is just an illusion and that we are completely programmed to have the ideas we do and execute them. Perhaps we are mistaking the experience of receiving an imperative from unseen neural structures and obeying it unimpeded as being more than a robot.
Ask yourself this: If you discovered unequivocally that you were a robot - just an observer that becomes aware of desires generated outside of consciousness, and of the bodily responses to it - what changes for you? Are you suddenly unhappy?
It's a strange idea, but imagine it. You have just discovered that we all have never been anything but what you call a robot. Is that bad? It was fine before you learned that, and thought that you were the author of your will. What would you do differently. Nothing. That's the point. You wouldn't actually be making choices anyway, even choosing your reaction, which at first would be shock and disorientation, and later, you would return to life as usual, now aware that it had always been robotic, and that is good. You might wonder why you weren't better programmed, why you get destructive impulses that at times lead to destructive behavior.
Free will is an enigma for monotheists (I know Christians best, so they will be whom I refer to). They don't really approve of it, although they need it if they are to justify worshiping a deity that punishes for disobedience. This is unjust anyway, but would be more so if it were demonstrated that the disobedience was inevitable, i.e, that there is no free will.
But it's that disobedience that they object to, the expression of which they often condemn. They describe it as willful rebellion. The Bible is written in commands. If you express free will there and choose what they call sin, you will be punished in the afterlife.
If you are a Christian, everybody expects you to suppress free will and comply. Your Sunday school teacher doesn't like it when you question dogma. Your fellow congregants will ostracize you for expressing it (by which I mean, doing what you want rather than what you are expected to do). Your priest or minister doesn't approve. And you are taught that when you get to heaven, God won't approve of you exercising free will. Yet we're asked to believe that this was God's plan. That's just not believable. All of those people named would dial in your behavior if they could and strip you of free will as I said I would with my children if I could. Nobody likes it. It's just how it is.
If we could program everybody to want a vaccine, we would. Everybody would be as happy to get one as I was.