re: “Why did there have to be any description of hell in the bible? It seems that it’s primary purpose would be to frighten people into accepting Jesus, which wouldn’t seem to be a legitimate reason to accept Christ. So why not just leave hell out of the bible rather than seemingly use it as a sort of emotional blackmail to accept Christ.”
Good question. Look at it this way, if hell exists, NOT telling mankind about how to avoid it would be against God’s character. He tells us exactly how serious sin is by what Jesus endured on the cross, the death he died, the burial he experienced - sin separates us from God. Sin is a choice we make. The ultimate sin is rejecting Jesus, Who is God in the flesh, Who took our just punishment. He endured the death and punishment we deserved Himself in our behalf.
If we reject His provision, we face the ultimate consequences ourselves.
We don’t consider it illegitimate when a doctor informs us the truth about our medical condition and the consequences if we choose to refuse the treatment/cure for that condition. We shouldn’t consider it illegitimate if God informs us of our true spiritual condition and the ultimate consequences of that condition if we refuse His cure.