3. Not gaming nature’s system – what would that mean? Could it be to try to have as many children or something like that? After that this is what nature wanted to ensure when it endowed us with our proxy emotions. I’m not sure it’s better.
Right, having as many children as possible is exactly what it means, now you can reject your natural "purpose" if you want, but it's futile, in the grand scheme of things, you will just be replaced by those who more effectively act out their natural "purpose".
Your points 1, 2 and 4 rely on the assumption of hedonism, points 2, 3 and 4 rely on the assumption of altruism, the author rejects both:
https://thewaywardaxolotl.blogspot.com/2024/06/hedonic-utilitarianism.html
Right, having as many children as possible is exactly what it means, now you can reject your natural "purpose" if you want, but it's futile, in the grand scheme of things, you will just be replaced by those who more effectively act out their natural "purpose".