Torrez/Gruber seem to be arguing smartphones are superior cause you aren't always focusing on them, but what is stopping you from not always using the glasses?
I've searched a little but can't find a picture of someone wearing them pushed up onto their head like people often do with sunglasses. But I too don't understand why people seem to be ignore that option in their objections. Or put a lanyard on them and wear them around your neck when you want to show everyone around that you are not splitting your attention.