I wouldn't say they don't deal in truth. Scientific theories clearly capture a lot of true elements of how the universe works. But proving that the mathematical

I wouldn't say they don't deal in truth. Scientific theories clearly capture a lot of true elements of how the universe works. But proving that the mathematical methods are correct, starting from basic axioms, is something for mathematicians. Most physicists will use a mathematical tool if it's useful, even if it's not been formally proven correct.