These poor deluded fools cannot even be consistent in if acceptance of evolution is “humanism” and worship of humans as neo Gods - or a degradation of humanity as “just an animal”.
Your premise slightly restated:
It seems Kant was fixated on the fact that natural science has a million and one useful applications while their supernatural explanations for physical phenomena have never been of any use to anyone.
Poor deluded fool. His “fixation” cost him his soul...and reason.
Maybe I'm missing your point, but if we honestly look around, faith in God has brought quite a bit of good into the world, such as Mother Theresa (and those who served with her), Billy and Franklin Graham, The Salvation Army. So it would seem these 'supernatural explanations' do have some very positive ramifications.