Why do you think he can't be a 5-star WR? He is faster than the fastest WR in the NFL, is way larger than any fast NFL receivers, and very muscular. Sure he may need teaching on route running, etc., but he looks like someone who could physically dominate a CB.
He might be able to do that.
Lots of fast, muscular guys aren't good wide receivers.
right now, his entire focus is track. Most all good receivers are working every day in June on being a receiver.