Science answers more fundamental questions about how stuff works.
So the question "how stuff works?" is for you more fundamental to the question "how to live properly?". I don't think that's really true. Thus science actually deals with less fundamental questions.
So it's not enough to build a new society, but we have to build a better one.
But how do you decide which one is "better" if science doesn't deal with value systems?
If I don't know how stuff works then I don't even know what life is, or what living is, or how to live at all. So how can I focus on how to live property if I don't know what living is?
If you don't know you need to drink water, eat food, require certain vitamins, etc, then you will not live for very long and all those questions about what is proper are quite irrelevant.
I believe it all starts with knowing yourself, and knowledge of self comes from science. Once you know yourself then you can focus on yourself in relation to others using philosophy.
Whatever you prefer is what is better for you. It's not for science to decide what you prefer. Science simply generates knowledge, how the stars work, how physics work, how the human body works.