what she says i'm fine

what she means in the first episode of voltron legendary defender coran says that the castle of lions is 10600 years old and that his grandfather built it. in the fifth episode when coran and hunk go to the balmera coran says his grandfather brought him to a balmera while he was building the castle of lions. coran and allura were in suspended animation for 10000 years. this implies that coran is over 600 years old. from the way he and allura interact in the second season we can conjecture that coran is in late middle age, or maybe early old age. how long is the average altean lifespan? how long is the average galra lifespan? zarkon was displeased but not surprised when his head druid told him allura was alive. exactly how unbelievable is it that they're both alive after 10000 years? is this why allura and coran acted like the paladins could easily free the entire known universe in their lifetimes? do allura and coran know how short human lifespans are? how