This is overstated. I'm 210 lbs (i.e. not light) and I run my tires at 100psi - anywhere from 20-40psi below a tire's max. There is a noticeable difference in comfort from 130psi to 100psi. In the last five years, I've had a couple of punctures, but never ever a pinch.
Clearly an under-inflated tire is at risk, but you definitely don't need to run them at max.
Maximum for 23C tire is approximately 120psi. At 210 I'd run close to that pressure, but like almost anything personal preference is involved.
I ran lower pressure a couple times and I felt more pebbles on the side of the road/highway (which was a weird feeling). Small bump absorption was slightly better. However I also pinch flatted both times within a couple rides. At 110 to 120 psi (max rating is 120 for my tires), flats are now a rare event and pinch flats do not happen, the ride is actually better overall, and the tires don't squirm as much. Personally, I always look for how much deflection there is on the tire when seated on the bike. Right amount provides best rolling, grip (weather dependent), and safety. Too much or too little pressure can have the bad side effect of the tire bead unseating.
If suppleness of ride is important, bike components can absorb vibration. Thicker handlebar wrap or gel underlays remove shock from the hands; padded seat or good padded shorts remove vibration from the butt.
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