I think the path each of those guys took played a big part in the players they became.
Griesel's evolution as a player probably doesn't happen at a higher level where he got to play right away as a hustle guy 3/4, then mid-career moved into a point guard role, then after three years developed into a really effective player as a senior that earned him the opportunity to make the leap to a high-major conference.
Similarly, I think the freedom Scheierman had early in his career playing against Summit League defenses as a primary initiator allowed him to develop into the dynamic player he became by the end of his time there. I know Matt thinks Creighton messed up by not running everything through him as the point guard, but he's just not dynamic enough physically to consistently create with the ball in his hands in the Big East like he did at the Summit level, though he eventually found a beter balance as the season went on between his on- and off-ball play. There was definitely a big adjustment period for him though.
Like Griesel, Tonje and especially Allick were both late bloomers in high school (Griesel was good early then exploded at the end like Tonje, whereas Allick played mostly JV his junior year). Tonje was always a shooter and a bouncy straight-line athlete, but his offensive game really expanded as a senior. Lateral quickness and ball-handling against athleticism were concerns, though. At CSU, John didn't play much as a freshman and wasn't particularly good when he did get a larger role as a sophomore. He broke through a bit as a junior and was their second-best player this past season as a senior. But he has one season out of four as a double-digit scorer in the Mountain West. Does he stick around for four years to become that if Nebraska takes him out of high school?
Wrightsell didn't look anything like a high-major player his first two years at CSF, but a breakout year has earned him this opportunity to test himself in the SEC.
It's also worth noting that Griesel and Scheierman are the only ones on that list we've actually seen play a season at the high-major level to this point.
I think the conversation is far more nuanced than seeing guys have success elsewhere and saying Nebraska should have recruited them out of high school.