How about this: Every single NHL team has an AHL affiliation which means they DO ALL SPEND MONEY on player development. Running a 76 game AHL season, and paying players 75-250K USD is an absolute investment in player development. These AHL teams all have full coaching staffs, trainers, doctors, etc ... so again, that would be considered a tangible investment in future prospects.
In my humble opinion, player development is much more of an organizational philosophy than it is something you can simply throw money at. Unlike European soccer, NHL teams have no rights or access to players until they are drafted. Conversely, a European Soccer Academy will have hundreds of teenagers in their academies and guide 100% of their skills / training / game play. As they grow older, they play for the (U14 / U16 / U18) clubs etc. whereby only a small select few actually ever make it to the BIG team. That is player development.
In the NHL, 99% of drafted players are committed to either: NCAA, USHL, OHL, WHL, QMJHL, KHL (VHL/MHL), Liiga, SEL. All these teams have their own coaching staff, dedicated trainers, etc. 90% of a kids development will happen within their club team (not affiliated to NHL).
Yes, NHL teams will host a week long rookie camp and speak to the importance of proper training routines, nutrition, etc., but if you think any of this stuff is *new* to players, you're not aware of hockey in 2021. These elite kids come from hockey academies elite programs and have been living this world since they've been 13 years old (probably younger). If they don't make the NHL, they continue to play with their club team where they develop some more.
Not trying to diminish the role of Keane or Jimmy Roy - I'm sure it's fantastic for the kids to have them as resources. But you're kidding yourself if you think Chaz Lucius will get more from a few phone conversations than he will from the Minnesota Gophers elite NCAA programming.
True and tangible hockey development by an NHL club is likely token at best UNTIL the player actually starts playing in the AHL at which point a true hands on approach can commence.