Luka had athletic limitations so his ceiling was always rooted in him becoming a better shooter, peterson doesn't have those issue.
What you're saying is you give projects and raw players higher upside variables, while that may be true their is tons of examples of them never reaching that potential. Peterson has a lot of growing to do himself, he can be significantly better from midrange and getting to the line. I dont think he's anywhere near his ceiling. If Peterson was a 6'3 guard with smaller wingspan I'd agree, he's a 6'6 guard with a +5 wingpsan