The evidence is that pro sports teams, hockey and otherwise, develop talent all the time.
Like... a player gets to a new team, gets new coaching, improves. This year with Lafreniere is an example.
I'm not going to give you a list of examples because it's everywhere.
Your assertion is bewildering. Yeah, pro sports teams don't develop talent.
Wrong, they do.
Did Quinn develop Zibanejad and Buchnevich?
They improved greatly under Quinn.
Laviolette inherited Laf and Kakko.
If you credit Lav with developing Laf, does he get the blame for the de-evolution of Kakko?
You don't see the failure of your logic?
You gotta make the playoffs again at some point. This summer and next is when they should be moving draft and prospect capital for legit NHL'ers to build an actual team to supplement their high end youth.
Does anyone believe Lindgren moves the needle to playoff team?