Also, ultimately we have to decide how far we can trust the statements of these evil little slavers.
The superficial impression is that the crash of the Columbia was an accident, and the saving of Vina an act of mercy. However, the Talosians do maintain an underground menagerie of captives, and we never quite learn whether the other cages hold prisoners that are conceptually different from Pike. Last surviving native lifeforms of the planet - or captives from other crashes, found unsuited for the slave labor program?
It would make sense for the Talosians to use their powers of illusion to lure in numerous spacecraft and then try to find breeding pairs amongst the wreckage. But the Talosians are self-admitted klutzes, unaccustomed to and unskilled in any physical work, and thus the survival rate of their captives might be abysmally low. We can speculate on whether Vina really was the victim of an honest accident but subsequently became their inspiration for a slave-hunting program, or whether she was just victim #34 in the ongoing program.
Thus, we can also speculate on whether Vina's tortured form was any more true than her beautiful shape. Perhaps the Talosians faked an old cripple so that they wouldn't have to give up 25% of their human captive program, even though circumstances forced letting go of the recently acquired 75%?
Timo Saloniemi