This is a bad idea. I think he’s wrong. More power into headwind guarantees more aero drag energy losses.
If running uneven power approach, it should be:
- Higher power where you feel less wind on your front. (accelerating, uphill, tailwind)
- Lower power where you feel more wind on your front. (downhill, headwind)
Changes to power should be substantially more subtle for wind-based adjustments than for grade-based adjustments.
Rationale: You’ll be traveling slower and cause more time-cost if you don’t keep power reasonable into the headwind. Power can be dropped substantially on mild descents with very little time-cost.
Related info, when cars pass you in the same direction as your travel, drag losses are reduced as a percentage of your power output. It’s a great time to sit up and modestly increase power output. The opposite of both is true when you have oncoming traffic creating momentarily increased drag losses: get small and marginally drop power.