Absolutely. Escapism has its roots in the process of imagination, without which I'm confident that humanity would have gone collectively insane long before now. Like any indulgence, excessive escapism is potentially a problem--just ask those Korean and Chinese kids you occasionally hear about in the news who died from WoW addiction or somesuch. (Oh wait, you can't. THEY'RE DEAD.) But in the absolute absence of escapism and the ability to pretend, what exactly would separate humanity from automatons? Without the creative force of the imagination, we'd be deprived of almost everything that we've come to collectively value as culturally valuable, and might even lack emotional functionality. After all, there's nothing concrete tying us to the concepts of love, hate, and whatnot...they're manifestations of a creative force, just as the concept of escapism is.
And just because I feel this is actually semi-relevant and I'm on a Daoism trip, here's a little somethin' somethin' from the Dao De Ching:
"I have the ability to remain poised and centered
Regardless of what proceeds before me."
Which is kinda how I view escapism. Indulge in bouts of both intense productivity and intense imagination, but never forget to maintain a balance. (Hey, you said this was philosophical...don't blame me for upping the pretension level right from the get-go.)
