I played several more years of touch football than full tackle. Flag/touch rewards skill, speed and evasive quickness, the ability to spot and analyze patterns of moving people on a field.
High-end football doesn't neglect those skills, of course. Ask David "The Deuce" Palmer, all 5 feet 9 inches and 165 pounds, or the more sturdily built yet adaptable artists such as Julio Jones, Amari Cooper, Shaun Alexander, Derrick Henry, Damien Harris, Mark Ingram, Eddie Lacy and Trent Richardson. Their explosive elusiveness turned them very extremely dangerous, added to bull-like strength. And was it just a pair of years ago we saw Najee Harris and Devonta Smith crafting high-speed aerial ballet game after game?