Also flapless landings give better controllability in strong winds/crosswinds
If I was landing a PA28 in a 28-30 kt X-wind I would take full flap every time; and I teach accordingly. I would not dream of landing flapless, drifting sideways across the runway, waiting for something to happen. Maybe if it was very gusty, I would reduce to 25 degrees flap but no more.
the ground run is not that much greater due to the 'headwind'
In a strong crosswind there won't be much headwind!