'meant' was used to the effect of 'destined';

I've no disagreements with your position or moral principles. But spherical cow is different from reality.

By 'destined' I assume you mean 'there was never a way their life would play out other than them becoming slaves'. But the word 'meant' and 'destiny' carry a meaning of "it is the right thing to happen", which I think we all agree is not the case.