Dyno Vs.Drag Strip Testing

i have no horse in this race...i don't drag my cars.
But you dyno guys would have to return to the dyno every time you make a change to see what it did and i doubt if that happens unless it's your profession.A life long local racer who has raced everything from small blocks to Hemis had little use for a dyno and in his book he wrote the highest horsepower engines never et'd well. Always made his changes based on the total package,logic and experience... then went the track.