You are side stepping the question.
The appearances are listed as of first importance along with the others. If a person cannot be saved without understanding and belief in the others, why is the same thing not said of the appearances?
peace to you
No, I am not side-stepping the question. You made factually incorrect statements about what 1 Cor. 15 says so I had to correct what you said.
You claimed that hearing
specifically about the more than 500 who all at the same time witnessed one of the resurrection appearances was of equal importance to the death, burial, and resurrection. I corrected that by showing that hearing and believing about
that specific appearance was not of such importance.
Regarding your further question, First Corinthians 15:1-8 is not the only passage in Scripture that teaches us about how people are saved. God inspired the Gospel of John and directed John to write that those who read what he has written in his Gospel and believe what he has written in it will be saved:
John 20:30 And many other signs truly did Jesus in the presence of his disciples, which are not written in this book: 31 But these are written, that ye might believe that Jesus is the Christ, the Son of God; and that believing ye might have life through his name.
John does not mention the appearance to the more than 500, but he does mention some
other appearances. A person who reads the Gospel of John and believes what it testifies to him will be saved even though he does not hear anything about some of the appearances that are listed in 1 Cor. 15:5-8. By comparing Scripture with Scripture, we learn conclusively that hearing about the appearance to the more than 500 is not necessary for salvation.
I always tell people about the appearances if they allow me to do so in my witnessing.
If someone is told about one or more of the appearances and rejects that testimony, he will not and cannot be saved. The appearances prove that Christ rose bodily!