Very interesting. The Gemara uses the fact of not making a bald spot being called “Bein Einayim” to prove that it means above the forehead by Tefillin as well. Academic researchers have pointed out that the phrase “between the eyes” means above the forehead in several ancient middle eastern works. Apparently it was a common idiom at the time (which highlights the anachronistic foolishness of the Karaites for being unable to realize that their simple reading of the words did not take context into account).
Though this is certainly a very cool Remez.