Frankish is a fool. Textbook definition.

Philosophy is "love of wisdom ". Wisdom is that knowledge which can only be had in the light of all experience. And knowledge can be either subjective (reletive to an individual's mind), or objectively true (for all people, demonstratable to the 5 senses and mind of all).

So the entire purpose of philosophy, is to find truth. To find what is real, to all human beings. Philosophy reveals objective and universal truths.

But a person who has teleologically resigned themselves to the moral reletavism of secular post modernism, by definition, denies and can never find, truth.

They end up "begging the question" towards their own foolishness. They become reletavistic animals, who run on self interest, alone.