Because drafting a guard in the top 10 is stupid? Yea, its been proven to be, and multiple former front office people believe so.
So you are telling me if Roquan becomes a HoF'er, and so does Nelson, you end up drafting Nelson ahead of him? I'm betting you 32/32 teams say theyd take the linebacker.
The best guard in this draft isn't even Nelson thus far. That kind of proves your point false. Now if you knew he was a HoF'er, as I said, it would be worth a top 10 pick, but so far he hasn't looked anything close to it. There is no such thing as a "sure thing" in the NFL, just look at Tony Mandarich, which was one of the highest rated lineman prospects to EVER come out. The odds you draft an elite guard in the 2nd/3rd/4th round are much higher than any other position. THAT's why its not a smart pick.