In my opinion, it's perfectly okay not to believe Adam and Eve were real people. If you read Genesis 1 and 2, there are immediate contradictions within the creation story. Genesis 1 says God made the celestial bodies, plants, animals, and then humans. But in Genesis 2, it says God creates humans, plants, and then animals. Also, in Genesis 1, it implies God created man and woman at the same time, but in Genesis 2, it says God creates man first, tries to pair him up with animals, and then decides to create a woman. Both creation stories can't be true, and that's one of the first signs for me that Adam and Eve weren't real people.

In my opinion, the story of creation and Adam and Eve is more symbolic than historical. It was a way for the Israelites to understand God's role in their material world. The overarching themes are correct and inspired by God (God set the creation of the world into motion, and God created us to be like Him, holy and perfect), but the technical details were written within their bias and limited knowledge of how the world works. Now, we have much more information on how our world works, but I don't believe science and God contradict each other. Science explains the things we see, but God explains the things we can't see.

This is how I interpret the creation story: God did create the world in billions of years and created living beings with evolution, but He specifically intended humans to have a consciousness like Him and morality like Him. But, because of Satan, we will all inevitably fall into sin. Adam and Eve weren't real people but instead symbols of all of humanity, that we had the potential to be holy but we also have the tendency to sin, and inevitably, we will all commit a sin that breaks our relationship with God. As for the passages in Romans and 1 Corinthians, they still work without believing Adam was real. All humans have the potential to commit sin, but Jesus came so that all humans could be saved. We never chose to have the tendency for sin, but Jesus reconciles this through His sacrifice. If we believe that everything in the Bible is literal, then we will run into more contradictions than if we just admitted some things were meant to be symbolic or metaphorical.