James wondered why any Christian ever might disagree with him. Fortunately, he has the answer: they are ensnared by the World, and have not allowed the Holy Spirit access to every area of their heart. When they do, they will think exactly as he does, and leave behind the things he disagrees with- which are “The World’s System”.
This absolves James from thinking. Anyone who disagrees with him is simply less spiritually mature than he. When you have had the same inestimable blessings James has had, you will think just like him, and if you do not, and go to Hell- well, the ways of God are strange.
Whereas, we do not all follow the same path of spiritual maturing, but learn different lessons at different times.
One has only so much head-space, and surely it is better to devote it to learning what is Right, what I Believe, than to listening to wrong people. This short-cut absolves you from ever having to refute them. Their ideas are not even wrong in an interesting way, so should not detain us.
I give some attention to any opinion. Possibly, it will increase my understanding. I might be happier with more confidence in my own opinion. There are many good choices: like the supermarket cereals aisle, there might be a best cereal but there are many which are good enough; with so many things one can be wrong, but not wrong enough to hurt. I am giving more attention to attitudes, ways of being: some people with ways of being with others, or in the world, radically different from mine, seem effective or happy and I might learn from them. Though some are merely an awful warning.
Like James, I experience God as changing me, bringing me to health. The changes are unimaginable beforehand, sometimes inexplicable after. It is one reason why I am religious not atheist: I do not proceed by rational argument, but sometimes against what had seemed rational.