Must != Free.
With GPL, you must share derived source.
With MIT, you can share derived source.
Therefore, MIT is more free than GPL.
With GPL, you must share derived source.
With MIT, you can share derived source.
Therefore, MIT is more free than GPL.
Also, the fact the FSF has its own definition of words "free" and "freedom" doesn't make that others are not free to use the more common meaning of the word. Free != "free"