Because I don't think we have the roster in place to justify that. I think maybe in one more year (possibly two) we should be better positioned for that.
Right now our entire backend except for Karlsson is terrible and we have horrific goaltending too. And neither of those issues figure to be addressed this off season. Actually our d might be even worse going into next season becausae Dubas' comments about EK make it seem like he's pretty down on him and therefore I wouldn't be shocked to see EK get traded. I'm way higher on EK than the org is and he's our best dman by far. If we trade him our backend will be dire.
On forward I expect McGroarty and Koivunen to grab spots out of camp but I don't expect them to be impact players next year. They'll have good games but it's going to take them time to acclimate to the NHL. I'm not looking at one small stretch of good play at the end of the season when nobody cares and assuming that carries into next year. People forget how hard the NHL is. Those kids are gonna struggle. They'll play well too, but there will be struggles. In a year or two they'll hopefully have established themselves as quality NHLers, but I doubt it will be instantaneous.
So then we have no goaltending, a bad defensive unit that might get even worse, and we're also essentially a one line team on forward since Malkin does not have enough help and our bottom six is terrible.
Once the Pens make a few top 10 selections and hopefully some shrewd trades and signings they'll start to address those problems, but that's not going to happen over one off season. I don't see how it could even if Dubas wanted to.