I think it's dumb personally. You see this kind of thing every year.
This is a bit of misinformation. Pro scouts have limited access to underclassmen and they are never sure who is going to declare so they don't invest as much time drilling into underclassmen prospects as they do senior prospects. This is especially true for draft eligible sophomores. So, after the date when underclassmen declare, scouts start really diving into those players. That is why you see underclassmen move so much between the season's end and the draft. Same goes for small school prospects after they go the the East West game or Senior Bowl or any other all star setting. Scouts finally feel they can get a nice in-person apples to apples eval.
Draft media on the other hand spends a lot of time delving into prospects but their opinions aren't necessarily a great gauge in terms of the league's opinion. That is why you see so many in the draft media adjust their rankings when Daniel Jeremiah comes out with his initial mock and top 50.
So let's take Sewell. His best tape reps are very high end and were as a sophomore. So he was young and flashed some very high-end traits. Scouts in the media got excited and projected what Sewell COULD be. Scouts on teams put Sewell on their radar as someone to watch but put more emphasis on consistency which Sewell was never able to show.
What does this mean? It means that as of his tape and pro-day, Sewell is a high ceiling player with league-standard measurables and athleticism. His tape is inconsistent but he has flashed high end skills. He is considered one of the top players at his position, and one of the top 15 players in the draft, but he is not viewed as a top 5 player in the draft which scouts generally reserve for generational guys. That real outlier type of a prospect.