Are you disputing BB's claim that the should is not a suitable subject for scientific investigation?
Oddly enough, you seem to be agreeing with me on this. Anything that has observable effects can be studied by science.
But gravity has no substance. It cannot be directly measured or observed. It can only be detected through its influence on objects within its field.
If that’s the case, why isn’t that categorized as the supernatural? It is no more detectable than God is and in no other way than God would be.