There are legitimate reasons to fear death if you don’t belong to the family of GOD, because that means eternal separation from HIM (if you formerly knew HIM but no more or not at all).
“I tell you the truth, whoever hears my word and believes him who sent me has eternal life and will not be condemned; he has crossed over from death to life.” (John 5:24)If you confess with your mouth, “Jesus is Lord,” and believe in your heart that God raised him from the dead, you will be saved. For it is with your heart that you believe and are justified, and it is with your mouth that you confess and are saved. (Romans 10:9-10)
and might free those who through fear of death were subject to slavery all their lives. Hebrews 2:15
For the wages of sin is death, but the gift of God is eternal life in Christ Jesus our Lord. (Romans 6:23)
Well, “it is never expected of any man to repent of being a Christian on his or her deathbed, but to see a sinner repent from his/her sins, or want more of CHRIST.” So if we’d rather not fear our deathbed, we must trust Jesus CHRIST for our grand salvation. Christians have no reason to fear death. GOD has promised wonderful things after death for those who believe in HIM.
“For the Lamb in the midst of the throne will be their shepherd, and he will guide them to springs of living water, and God will wipe away every tear from their eyes.” Revelations 7:17