While you're at it, how good is capitalism as a moral system?
Science asks what and how something in existence behaves. Only religion asks why things are the way they are. Most world religions also do a poor job at answering why.
You are not going to answer why things are the way they are through science. Nor does science have any answers for the meanings and purposes to life.
Philosophy is the only other method of asking why things are the way they are, and the meaning of life and it's purpose.
Everyone that opposes religion does so with their own philosophy.
Scientism is that some people feel that science can answer all questions about reality, being and existence.
The only place where science crosses into religious territory is with the dispelling of ancient claims involving nature found in various scriptures. Otherwise never the two have anything to do with each other.
Capitalism has no moral compass. It's not a moral system. If anything capitalism is the wild. There's nothing civil about capitalism. Government and law is the only recourse people have for their moral concerns.
Religion v. philosophy is where the arguments are. Naturalism, physicalism, reductionism vs. religion.