Good luck testing one of the currently accepted "ethical system"-type religious beliefs.
The only kind of outcome of such a test that is "allowed" is full agreement with the ethical system. A lot of these systems are just as self-reinforcing and barely based in reality as Christian apologetics of Aquinas or Chesterton. The people holding these beliefs know this on some subconscious level and will viciously attack anyone who disagrees. It is only over time with many such "attacks" that a mass belief will die and be replaced by another one.
In fact, every one of these "ethical" religious beliefs came about the same way: it defeated another commonly agreed upon dogma.
This mechanism by the way is what runs civilization. One meme fighting another.