Well, we start with as many known quantities that we can. In this case LA being undefeated and a staple in largest class finals as well as wins over a number of the perceived top teams is the closest thing to a known quantity that we have. Using one data point is never optimal, but sometimes is the best thing we have. Luckily this year we got something that we almost never get when 4A powerhouse played 8A powerhouse, then played SHG (5/6A powerhouse) the next week. It confirms the theory of classes being "better" as they increase when Rochester got brutalized by LA. I have no choice but to extrapolate that to 4A excluding JCA since JCA already showed they can play with schools like Rice.
So, one can attempt to knock down the arguments for Lockport, but what would be their argument for another team?