That is exactly what I’m saying.
I will give my laws into their mind, and in their heart will I write them: and I will be their God, and they shall be my people:
God has written his laws into our hearts. He has made us his people. Check.
And they shall not teach every man his neighbour and every man his brother, saying, Know the Lord: for all shall know me from the least to the greatest of them:
As a result of these laws being written into our hearts, it will not be necessary for men to tell each other that we are children of the Lord because we will know it innately, as we shall know his laws. Again, check.
Unless you can tell me why knowing God’s laws would affect our free will, then you do not have a valid argument. Why would knowing that something is against God’s will prevent us from being able to do it? Again, I refer you back to my example about the parents. I can know that my parents have told me not to do something; that doesn’t change the fact that I can still freely chose to do it.