Because its good for the league to have a player of his caliber on a team. Whatever team gets him will market him and sell more tickets. And then just from a GM standpoint, it seems like several GMs are just waiting to see what this guy is going to do. If he just bolts to the KHL he wasted everyones time.
Oh c'mon. The most prominent rumored teams to be in on him are Detroit and Pittsburgh, neither of whom would market him alone or need him to sell tickets. That reason would be more for a bad team that has trouble with attendance and its unlikely he goes to a cellar dwelling team. The guy also speaks very little English, which would limit his marketability on his own. Who cares if he's wasting an NHL GM's time? There isnt much of a UFA market right now, so there's really no rush for Semin to decide anything. I'd much rather see him go to the KHL than go to a team in our division. IMO we need him more than any of those teams, and if hes not going to come here, then I hope he goes to Russia.