If you need an omnipotent "higher power" to threaten you with a lake of fire in order to be a good person, then you are a horrible person at your core. Some of us manage to avoid raping, robbing, killing and voting for Democrats even without a fairy tale to guide us. You'd probably be amazed if you knew how people that you probably already respect really feel about magic apples and talking snakes.
Just a point of order, the lake of fire is only for those who refuse to accept that God is Lord at the last judgment. It doesn't have anything to do with being a good person. Being "good" is just a natural consequence of being in a relationship with your Savior.
Everyone is born with the innate knowledge of right and wrong. We call it a conscience. I am not amazed that some very good people choose not to accept the gift. I spend a lot of time with those people for just that reason.
If you knew the secret to immortality, would you hide it or share it?
Now, intellectually, post-modernism says that everything is relative. What is good for you is good for you and what is good for me is good for me. And that is fine I suppose, if people can live in a bubble, but when they meet other people, it becomes a bit of a challenge. Which is why it is helpful to have a higher power that gives guidance on what is right and what is wrong, and what will lead to joy and what will lead to despair. We have already seen the effects of post-modern thinking as it slowly makes it way through the culture. Whether you are Christian or not, the consequences of post-modernism are being felt by everyone.
For instance in this thread. What is masculine? Well, it is whatever I want it to be. What is toxic masculinity? Simple, it is everything that I don't like about masculinity. How much should people be taxed? What government programs should we have? Should parents be allowed to reassign gender at birth? Should people be allowed to have guns? Should people be allowed to own property? etc. etc. etc. Without a guidepost culture becomes "anything goes."