I don't value 2nd round picks that much but doesn't this chart disprove its own estimations by saying the proper return value would be in the 9-12 range?
If we pick 10th in the draft next year and KD trades that for #20 + #34 I'd be pissed. The value of these draft picks going down very quickly outside of the top 15 or so. You're WAY more likely to get a good to great player in the 9-12 range than you'd be to get two good players at 20 and 34 no?
20 -> 10 is only ten spots at the end of the day. A 2nd doesn't have to be that valued since you're not making up so many spots. It's not infeasible at all that 10th ends up nothing because 10th is already well within the "yeah they can definitely bust" range, and 20th ends up really good, or they both end up nothing and 34th ends up good.
It's really the extra bite of the apple with another pick, only 14 slots later. The actual picks matter less than expected value, but you can look through.
2008: Cody Hodgson vs. Michael Del Zotto and Jake Allen
2009: Magnus Paajarvi vs. Jacob Josefson and Carl Klingberg
2010: Dylan McIlrath vs. Beau Bennett and Dalton Smith
2011: Jonas Brodin vs. Connor Murphy and Scott Mayfield
2012: Slater Koekkeok vs. Scott Laughton and Ville Pokka
2013: Valeri Nichushkin vs. Anthony Mantha and Jacob De La Rose
2014: Nick Ritchie vs. Nick Schmaltz and Mason McDonald
2015: Mikko Rantanen vs. Joel Eriksson Ek and Travis Dermott
2016: Tyson Jost vs. Dennis Cholowski and Andrew Peeke
2017: Owen Tippett vs. Robert Thomas and Nicolas Hague
2018: Evan Bouchard vs. Rasmus Kupari and Serron Noel
2019: Vasili Podkolzin vs. Ville Heinola and Bobby Brink
2020: Cole Perfetti vs. Shakir Mukhamadullin and John Peterka
2021: Tyler Boucher vs. Jesper Wallstedt and Olen Zellwegger
2022: Pavel Mintyukov vs. Ivan Miroshnichenko and Cam Lund
2023: Dalibor Dvorsky vs. Eduard Sale and Gavin Brindley
Some years give a clear winner one way, some years give a clear winner the other way. Some years it's just crap all around. However, I can look at that and think "yeah it's probably a fairly even trade". I think people maybe are a bit caught off by a 10th overall pick busting or a 20th finding success as "big surprises" but you're already passed the so-called 'sure things' by that point anyways.