That's one theory.
When considered everything that we can not test ...IE. fire burns, gravity, water seeks its own level and other testable ideas, moon landing, acorns grow to be oak trees ... and like kind.
Most all else ... medical ideas change and morph regularly, values are changing, educations has been and is changing for the worst, criminal laws are changing, as are punishments, law is morphing before our eyes, death panels are a vast jump into giving others the power to decide who has right to live or die, and so forth
Name something not changing. It is all based on theory. Often wrongly motivated.
God help us in our day, in Jesus name, amen.