Logic is perfectly capable of drawing conclusions about things which not even real. And since logic relies upon the acceptance of premises there is no way in which its conclusions are objective unless the premises can first be established as objective truths.
I don’t see any way in which you can establish such a conclusion objectively. The closest you can come is to establish that some of your habits are demonstrably self-destructive.
Perhaps I need to link back to some basic definition which I did in my introduction of myself to this forum.
In general I do not think any of the things of religion are objective. I simply refute the idea that reality is purely objective. One of the things I say quite frequently is that science consists of objective observation but life requires subjective participation, therefore science is utterly inadequate for the living of our lives and that is where religion comes in.
This question is confusing to me because I thought that is what I just explained in my post above. Can you explain to me why the post above does not answer this question for you? Maybe I am not understanding the question in quite the way you intend.