Isn't concern about Heaven escapist?
I answer the question with another question, from C. S. Lewis: Who talks the most against "escapism"? Jailers. Is it escapist for a baby to wonder about life outside the womb? Is it escapist for someone on a long ocean voyage to wonder about landfall? Is it escapist for the seed to dream of the flower? It is escapist if, and only if, Heaven is a lie. Those who call Heaven "escapism" are presupposing atheism.
(from Q&A on heaven, by Peter Kreeft)