Devonta Smith is 6’0” and 170lbs. Dean Jackson was 5’10” and 175lbs. Kyler Murray is 5’10” and 194lbs.
But they overcame it because they’re so fast, shifty, and athletic. They are all having legitimate NFL careers and contributing at a high level.
But you’re saying 5’8”, 170lb Britain Covey, a guy who’s hanging on to the NFL for dear life as a punt returner, is better suited for flag football because he’s shiftier? No chance. If he was as shifty as you think, he would have a legitimate role in the NFL.
Or are you saying that this Darrell Doucette, who played flag football at New Orleans Xavier University, is somehow a better fit than Devonta Smith on a football field? There is just no way that’s true.