Do you think not believing in a system is a disadvantage in anyway?
I think that it may not be a disadvantage because some of the morals and ethics in religion are applicable to everybody, and choosing to not believe in anything is just another persons way of life.
I think they are because, people who don't believe in a system aren't restrained by certain beliefs. They aren't tied down to opinions that are biased with a religion. They can express their own opinions without it having to side with a belief system.
Are people who don't believe in a system, more open to opinions?
It doesn't matter if you're in a religion or not. Things such as slavery or misogyny is against the law. Just because you believe in a system that might support slavery or misogyny does not mean it's right to go against the law.
Final question. Do you think it's right that people who believe in a system might use their beliefs to justify actions that reason will not? For example; slavery and misogyny.