The idea of compensation seems to be built into humans at some level -
I mean the assumption that if a person has some obvious defect then there will
be some compensatory gift, ability or virtue.
I would say that there is
not much empirical evidence for this being true, probably more against it being true - but it
seems to be something we feel or expect anyway.
Therefore; I assume the law of compensation is a metaphysical truth, something built-into us as a principle of reality - something which is true despite appearances.
If we knew more, and saw more (more widely, more deeply), then we would all perceive compensation at work all of the time; but, as it is, the reality of compensation is more like a hunch, a suspicion, or a hope.