I reject this whole concept of "rebuilding," not just when it comes to the Pens, but as a general concept in the NHL.
It's funny, I've never particularly liked Brian Burke, but I couldn't help but chuckle when he was once asked during his stint in Toronto whether the Leafs had to "rebuild" like the Penguins did. He retorted, "they won a f***ing lottery - that's not a strategy."
All of that is to say that it's not easy to just say, "ok, rebuild" and have a totally transformed team in 3-6 years. It's not uncommon to watch teams toil in mediocrity for a decade+ in this league.
I loathe the day that the Pens are relegated to the "rebuilding" tier of the league. There's no guaranteed success in that whatsoever. We just got insanely lucky by drafting MAF/Geno/Sid/Staal in succession. Just as easily could have wound up with a way, way, way, way, way, way, way, way weaker haul.
EDIT: To be clear, I'm not saying that the Pens should mortgage everything to cling on to hopes of winning when they reasonably have no chance to, I'm just saying that I don't "look forward" to rebuilding because it's not a panacea like some people think it is.