Great question -- because HS stats don't account for variation -- in quality of competition, in quality of teammates, etc. Two kids having comparable tools, but playing against different competition or with teammates who aren't on par, doesn't paint an accurate comparison. Example -- someone playing in against teams chock full of other D1 caliber prospects in Florida / Texas / California / Ohio is a lot different than a QB playing in CNY. Another example -- a kid playing with a D1 P5 WR or TE prospect might have much different stats than another QB not playing alongside that type of talent. Someone playing with such a teammate might have their stats inflated at the HS level, but not be as "good" of a D1 prospect. Which is why HS stats can be misleading.
Someone could throw for 100 yards against top notch competition, or 300 yards against lesser competition -- who performed better? Comparing stats alone doesn't tell the full story vis a vis potential / effectiveness / readiness. A kid with lesser stats could be equally as strong of a prospect, based upon such circumstantial variation. And for the record -- competition level isn't the end all / be all either. A kid could be immensely talented, but just so happen to play somewhere that isn't a hotbed of football talent. That doesn't detract from their potential, it just emphasizes that stats alone don't paint the full picture at the HS level.
I'm not putting down Lamson -- love his potential. I'm just suggesting that HS stats alone don't provide much insight.