@Leadfoot,
I am not sure what you are arguing. I don't have any disagreement with your claims about what the theist perspective is.
I have four points to make.
1) The scientific perspective is based on testable claims. Science drops any claims that are refuted by experiment and accepts claims as proven when there is no other rational explanation that explains the result of experiment.
2) There are many times when theories considered to be proven by the scientific community are disputed by theists. The Big Bang and Evolution are the two obvious answers. There are many more including the effectiveness of prayer and the objective benefits of certain moral values.
3) I don't make any claim that science is truth in any sense other than that it makes testable claims. This is only "truth" as a circular definition of truth. Then again, theism has no non-circular claim to truth either.
4) I do claim that science is far more useful, in a practical sense, than any form of theism.
Science has doubled the human life expectancy. It has sent men to the moon. It allows us to project our ideas around the world in fractions of a second. It cures diseases and allows us to travel anywhere on the planet in a day.
Theism has not done any of that.
There are things that science can't do. Science doesn't provide us a narrative. It doesn't provide us a way to understand the value of human life or a way to judge right or wrong. Many people want Science to do these things... the idea that science is a basis for human rights is a pervasive myth.
But my point here is that explaining the Universe in a testable way is the thing that Science does really well. Theism has always failed at this.
Theism shouldn't pretend to be science.