Watch this:

Premise 1: Physics shows that all events are either caused or random.

Premise 2: All human actions are events.

Conclusion: All human actions are either caused or random.

If human actions are caused, they are not freely chosen. If they are random, they are also not freely chosen.

And we cannot say that human actions are "caused by free choice" to save the concept of free will, for "free choice" itself is either caused or random.

"Free will" is either a misunderstanding of causation or a misunderstanding of randomness. It is not real, and is thus either an illusion or a delusion, depending on your view of how useful the fiction is.