Oh great, we've got the year round up of people smashing glass on concrete for Youtube views.
Anecdotally i've had every iPhone since the first one - I used a case twice on around the iPhone 6s-7 which were my least favourites - all the others were caseless and not one of them smashed when dropped.
I have a solid microcement floor at home, the iPhone 15 Pro bounced off it many times with no issue - in fact I tried to break the iPhone 14 Pro by throwing it at it a few times and that never broke either. Realistically no one is dropping a phone from 6 foot in height, who's throwing it from their head? It drops from your waist, out of your pocket, from your hands at a usable level. 99% of the time it'll be when you go to pull it out or put it away or much more likely when it falls off the arm of a chair.
I even had the iPhone 15 Pro fall out of my pocket on an electric bike going 15 mph and it bounced on the tarmac a bit, whilst there was a little tiny scuff you had to look for it and the glass was perfect. They really are quite hard to break in normal usage and dropping, a case is not needed.