I agree, Jok, etc. had better pedigree than CJF. Part of the surprise surrounding CJ is the series of "hyperbole practice shooters" who were advertised as future sharpshooters who would lift the team, only to see them be, less than advertised. CJ has changed the narrative, in a very impressive way.
Jok has a moderately better pedigree, but CJF wasn't without one. He was also objectively the best shooter on statistics alone making 49% of his 3's as a senior in high school vs 42% for Jok. Oglesby was a little under 40% as a senior. For reference, Connor shot 41% shooter as a senior on about the same volume as Oglesby.
I can't find it now, but I believe Ellingson shot 48% in high school. That may seem like an outlier to you, but Ellingson's problem wasn't his shooting, it was his athleticism. He actually shot 47.1% as a sophomore at Iowa on limited volume, he just couldn't keep up in the B1G. When he went to Drake, he tore it up shooting 46.9% and averaging 11.8 per game.
This is all to say that we all should have seen this coming considering that CJ played PG in high school and Fran was praising his defensive prowess within the first few practices of his redshirt year.