The only reason to have tuners on a guitar headstock is because you can pick the strings with your strumming hand while you tune with your fretting end, and that's the most comfortable and immediate way to do it.

Tuning a headless guitar reverses that and makes it a tiny bit more cumbersome, but any other aspect, regarding functionality of course, is objectively better: ligther in weight, smaller dimensions, neck doesn't dive when you play, more resonance, easier to carry around, you don't hit the top of the doorway when you wear the gigback on your shoulders...