Earlier quoted context omitted.
I wouldn't call these material luxuries, just like big screen TVs are no longer a luxury. Being able to visit a doctor or a dentist on the other hand...
By "luxury" I mean approximately "anything beyond bare survival". My point is that the vast majority of material possessions have become absurdly cheap by historic standards. However that doesn't preclude severe societal dysfunction (housing, children, retirement, or as you note doctors and dentists).
True luxuries (not having to worry, not having to waste time) are increasingly out of reach for most people.