From the study: 5% of energy from protein (low protein), 15% (normal protein), or 25% (high protein)

25% is not high protein. That means 75% is coming from either fat+carbs.

On a typical cutting (VLC) day, I'll eat 50% protein+45%fat+5% broccoli. And I don't consider it a high protein day.

If the average person reading this ate 40% protein + 40% fat + 10% veggies (like broccli) + 10% carbs (sweet potato, rice etc), their weight would stabilize much better, faster and for a longer period of time.