Then why do so many insist others follow suit?
I can't answer that, as I don't absolutely insist that my brothers and sisters follow suit...
But I do hope that they will.
Is religious philosophy (aka theology) as important to Gentiles as it was to the ancient Greeks?
I'm sorry, timothyu.
I don't categorize theology and philosophy the same as you appear to be doing.
To me, philosophy is man's vain efforts at trying to understand God without the benefit of belief in His words...
or they are man's vain efforts at trying to understand our own condition or situations and how to get out of them or else live with them.
"Theology" is the understanding of God and His word, but it's dependent upon the words on the page.
Theology can either be good or bad;
Based on things that God says that are either taken in context or taken out of context.
One's "theology" can either result in true doctrines, or false ones.
In addition, I hold that there are two different types of theology...
1) Borrowed from someone else, "systematically" or denominationally, or
2) Developed on one's own strictly through Scriptural study over a long period of time.
I see most professing Christians falling under the confines of #1, which I also see as not being biblical;
To me, we as believers should
all be studying God's word
for ourselves and checking the teachers around us according to their fruits.
As for doctrines, I find that it is permissible to establish those in the public eye, but they must be done strictly from the words on the page and not from commentaries or borrowed from someone's ideas of what His word states.