Those guys look good and being smaller can be beneficial but I don't see them being able to cover NFL receivers on passing plays. People seem to be forgetting that.
One of the WR/DBs on the US flag team is named Bruce Mapp. He played wide receiver at Coastal Carolina. He was listed at 6 ft. 205 lb in his playing days back in like 2015.
But look at his face
He looks Larry Holmes status now
I can't imagine him lining up against Tyreek, Davante, Ja'Marr, Marvin, Jaylen, Nico etc
Imagine the shyt Mahomes would be able to throw with no threat of getting hit...