I don't understand how knowing the future is the same as controlling the future.
Suppose each person throughout all time had a camera over their shoulder recording all the choices that we made during our lives, and G-d has the ability to view all those movies, how does viewing our choices equate to G-d controlling our choices?
If you know the actual future that means no one can do anything other then what they are going to do. Meaning you couldn't "choose" to do something else.
The, to me incorrect, concept of freewill is that you could choose a different future. If you could that would mean the future you knew was not really the future. So not that you'd control the future but that you could not alter it. The ability to alter the future some believe is a necessary component of freewill.
I think the right concept of freewill is simply the ability to do what you want to do. People are going to choose what they want to choose. So the ability to have an alternate future would require a person do what they didn't choose to do.
So since a person can't do something they didn't make a choice to do, there is no freewill. This concept of freewill doesn't make any sense to me but I guess that is the argument.