Question about bindings

The last time I've been snowboarding, I saw an incredible amount of people having the front binding not over their toes, but rather over the middle part of their feet, or boots. I'm far from an expert on the subject, but to me it appears stupid to have the bindings on that part. Having the bindings over the tip of your toes gives the most stability, I think, and furthermore, it also looks logic to me, since the shape of the bindingd appears made for that part of the boot. What is your opinion on the subject?