When in the flying hell has anything happened even remotely close to what you suggest in that first sentence?
How are you improving the team by trading Tkachuk, Stutzle, and Sanderson, if the goal is winning next season? Or are you suggesting trading them for multiple 1sts each and kicking the can down the road? You act like great players in the league shouldn't be given contracts they are worth. Paying those three around 24 million combined is not insane, and they are not at their peaks yet. The NHL as a whole is correct for paying stars good money when they are in their 20s instead of doing it in their 30s. The league would be worse off if every team had a Pujols contract.
Anyway, this whole idea about building around stars being bad is just stupid. Every Cup team has the stars they build around - Crosby, Malkin, and Letang, Ovechkin, Backstrom, and Kuznetsov, Doughty, Quick, and Kopitar, Kucherov, Stamkos, and Hedman, Kane, Toews, and Keith. Should all those fanbases just have treated those guys like random employees when they helped bring their teams Cups, and in three of those cases, multiple? Kaprizov hasn't and likely won't bring a Cup to Minnesota, trade him immediately! (despite being the first face of the franchise they've ever had)
It's a GM's job to have the ability to eliminate emotions when evaluating a team and making roster decisions. It's not the job of a fan. Or should you go to the Sharks board and tell them they have no reason for being upset that Hertl got traded to Vegas?
And as for your point about soccer and its stars, that's really not true. The impact of Xavi, Iniesta, and Messi leaving Barca was enormous and is still felt. When Figo left Barca for Real Madrid he was called Judas. Fans will rain down hell if a player betrays their team. I'd contest that soccer fans care about their teams star player more than hockey fans do, due to the nature of league structure and the fact that every elite player is at a high end team that's contending for league and UCL titles every year, so the pressure to perform is very high from the fans.