We don’t know what causes that collapse; or why one particle decays today and another with the identical wave function decays 5 million years from now, etc. What is to say that your will isn’t capable of preventing one collapse and bringing on another? And that’s why I still say quantum mechanics allows for free will.
Your mind can control itself. Not only that, but it can determine to control itself. Someone with a habit that largely determines their behavior, (something they find hard to do or not to do,) can decide this is a “bad” habit they don’t want to give in to anymore. And with work, hard work of retraining their brain themselves, change that habit. It happens. Your mind can control itself. It’s also true that people tend not to take the hard steps of retraining their brain when they don’t believe in free will. (as already cited.)
So, when you don’t believe in free will, you don’t tend to control your own mind. You let it do what it feels like doing.
When you do believe in free will, you’re more likely to control your mind and change what you let it feel like doing.
I conclude from that: If you don’t believe in free will you probably don’t have it and see no evidence for it. If you believe in it, it’s possible to have it, and you’ll see evidence for it. Seeing the same evidence of someone changing a habit, the non-believer says, “random coin flip;” the believer says, “my mind changed itself, and I determined that it would do that. I saw the possible outcomes for the coin and determined which one would happen.” (i.e. it’s not turtles all the way down as one non-believer put it.) Free will is specifically exercised when you go against your nature; when you change what it is you want to do.
Free will is still a very useful concept and it’s better for society if people believe it.
I think it’s irresponsible to preach otherwise. It promotes bad behavior to say free will doesn’t exist. And it’s the forseeable consequence. It’s obvious that if you tell people they don’t control what they want to do, they will choose not to try to control what they want to do. It entirely forseeable that they will continue in bad behavior; that they will start new bad behaviors because they are convienent and easy. “I have this feeling to do something convenient for me. Sure it will hurt others, but I have no control over my will, so their is no point in trying to control my will; there is no point in trying to do something else. I fell like doing this; I’ll just do it. I’m just a passenger anyway.”