Because you define what's meaningful?
Subjective morals do not equal personal morals. If objective morals did exist, they could be personal; but they did not have to be right - they could be objectively irrelevant or objectively wrong.. Subjective vs. objective is characterising morals and moral judgements as a whole.
The right and wrong of subjective morals is meaningful because it gives the sort of guidance that morals is supposed to give. Even if objective morals did exist, one would never manage to agree on how they should be practised and what to do when they seemingly contradict - meaning that the notion of right and wrong has big problems right from the start. If one cannot agree universally on what is right and wrong, then the fact that morals were objective would be nothing but a fun fact. No human could possibly know whether or not it was acting according to the right set of morals.
And what we have is uncertainty, so that is what we have to work with. Chosing to ignore this uncertainty may only ever be done through secular logic. Any non-secular logic depends on secular logic in this fashion - it relies on the fact that you can trust yourself and your observations. Descartes tried to save himself from this question, but his attempt fails ("I think, therefore I am" - but of course, Descartes could be a long chain of different identities highly similar. But I digress.).Occam's Razor says that in the absense of any other data we should work with what we have. We have one universe to work with, postulating others is merely wild speculation, we have no indication one way or the other, at all.
Yes, it is "wild" speculations. Yet, what I talk about could be true regarldess of how "wild" people of this time would consider it. So, if one is actually to get some sense of overview on things, one must account for all possibilties. These possibilites could have a real impact on daily life, both directly and indirectly - only assessing them may tell. The indirect impact in this case, is to weaken the idea of religious logic as somehow independent of secular logic.
Bookmarks