Your post is a little confusing to be honest.. of course you can't turn into the wind if you have a straight head wind, that is obvious. Turning into the wind only applies if you have any crosswind. And most often, there will be a slight crosswind from either direction.
About the glide distance, I have not made any calculations or anything to prove/disprove anything when it comes to that. The only thing I know is that if I lose my engine in a C-172 on a standard day I will be able to make it back if I lose my engine at 600 feet. Because I have practiced it before many times. It is certainly not a problem at all, and as I said, when I know I can make it back to the runway, why should I land straight ahead in stead?