[sanxiyn]

You are a monkey brain. It is not the case you should replace your monkey brain value system with some "better" value system.

Or rather, if you choose to replace your monkey brain value system with some better value system, such choice can be made only under your monkey brain value system. Value-system-yet-to-be-adopted is not your value system yet (entire question is about whether it should be your value system) and can't be the basis of your choice. (Yes, humans often make mistakes here, but that's because humans are vulnerable to circular reasoning, not because circular reasoning is valid.)