Well it is either that they don't get them or that they successfully develop them into quality players. Those two are great examples of guys who had the height but simply weren't decent BB players. Purdue's guys have the height AND the ability. That is a tribute to Painter because he is doing some combination of recruiting the right ginormous guys and developing the ginormous guys into quality BB players.
Yes. For a number of those guys, they didn't just come in on day 1 and dominate. AJ Hammons was very polished coming in, and Zach Edey was just a monster. But it's not like every 7-footer that ever wore the uniform has been the same.
Isaac Haas was VERY raw early. And he never had or developed all that much athleticism. He never left the post. And there's a reason he went undrafted and ended up playing in China. I'm not going to say he wasn't a great Purdue Boilermaker; he was. He was a matchup nightmare at the collegiate level that most people probably thought they'd not see again for a long time--until Edey showed up and was even more of a matchup challenge lol. But he had some pretty significant limits to his game.
Arguably, Matt Haarms never really panned out. He was good enough to play, but he was never a dominant big. He was kinda like a 7'3" forward, not someone who dominated in the paint--although he was a hell of a shot blocker. Isaac Haas, followed by Trevion Williams, were the guys banging down low. And he left Purdue to transfer [down IMHO] to BYU.
And nobody is talking about Will Berg. While nobody expected him to do anything behind Edey as a freshman, he was a sophomore last year and even after the Jacobsen injury, barely cracked 6 minutes per game. And has now transferred down to Wichita State.
So it's not like there haven't been misses.