JanMM

The 15% tire drop calculations are generally formulated for use in real world conditions and not perfect, faultless pavements.
The aim is not just lowest rolling resistance, but optimal performance and comfort.
This from the Jan Heine Bicycle Quarterly article:
"Tire pressures that correspond to 15% tire drop will optimize
your bike’s performance and comfort on average road surfaces. On
very rough roads or unpaved roads, it may be useful to reduce the
pressure. On very smooth roads, increasing the pressure slightly
may improve the performance of your bike."

To those of us who "grew up" in cycling being told to always run maximum pressure, less air can indeed feel 'funny'. It's often just a feeling based on a learned norm.
For a couple of years, I've been rolling with less pressure than I was used to and have had no problems but more comfort. I run about 50psi in the front 32mm tire of my long wheelbase bike (30/70% F/R) and have had no pinch flats or squirming cornering at speed. That's largely on real world suburban/rural not-very-smooth-with-the-occasional-pothole roads. 60psi in the front 35mm tire of the short wheelbase bike I use for my suburban/urban commute works fine, too. No pinch flats.

Agree with rekmeyata that "At the end of the day it's up to you how you want to run your tires"