Genuine NDEs and bodily resurrections, properly understood, do not "muddy up" the message the Gospel.
The NDEs and bodily resurrections that align with scripture (both the ones in the Bible and the ones occurring in our lifetimes today) are yet one more evidence of God's existence and the Gospel.
In the Old Testament, there are three cases of bodily resurrection. The aggregate of Biblical commentaries, encyclopedias, and hermeneutics study guides assert the two that Elijah and Elisha raised from the dead actually were dead before they were revived from death back to life though the third case can be argued either way:
1. The prophet Elijah prays and God raises a young boy from death (1 Kings 17:17-24).
1 Kings 17:17 Some time later the son of the woman who owned the house became ill. He grew worse and worse, and finally stopped breathing.
2. Elisha raises the son of the Shunammite woman from the dead (2 Kings 4:32-37).
2 Kings 4:32 When Elisha reached the house, there was the boy lying dead on his couch.
3. A dead man's body that was thrown into the dead Elisha's tomb is either resurrected (e.g. dead) or revived (e.g. not dead) when the body touches Elisha's bones and gets up and flees from the approaching Moabites along with the burial party (2 Kings 13:21).
2 Kings 13:21 Once while some Israelites were burying a man, suddenly they saw a band of raiders; so they threw the man's body into Elisha's tomb. When the body touched Elisha's bones, the man came to life and stood up on his feet.
In the New Testament, there are the following:
1. Jesus raising people from the dead such as the daughter of Jairus (Luke 8:41, 42, 49-55), the son of the widow of Nain from the dead (Luke 7:11-15), and Lazarus (John 11:1-44).
2. At Jesus's resurrection, the tombs broke open and the bodies of many holy people who had died were raised back to life. They came out of the tombs and went into Jerusalem where they talked with many people (Matthew 27:52-53).
3. Jesus instructing his followers to "Heal the sick, raise the dead, cleanse those who have leprosy, drive out demons" (Matthew 10:8) and Jesus's followers doing exactly that as in the case of Peter raising Dorcas from the dead (Acts 9:36-41) and Paul raising Eutychus from the dead (Acts 20:9, 10).
We are also seeing modern accounts of NDE's and bodily resurrestions in our lifetimes. There are documented cases in the 19th, 20th, and 21st centuries of Christian missionaries praying for people who have just died to be brought back to life (as per Matthew 10:8) and it happening.
Here's a recent example:
Former Muslim raised from the dead shocked her neighbors, won many to Christ | Godreports
NDEs muddy up the clear revelation on death given in the Bible.
All we need to know is not to refuse the message of the Gospel.
We need to know of the awesome blessing of relationship with the Father, through Jesus, empowered by the Holy Spirit.
Hebrews 12
25 See that you do not refuse Him who speaks. For if they did not escape who refused Him who spoke on earth, much more shall we not escape if we turn away from Him who speaks from heaven, 26 whose voice then shook the earth; but now He has promised, saying, “Yet once more I shake[h] not only the earth, but also heaven.” 27 Now this, “Yet once more,” indicates the removal of those things that are being shaken, as of things that are made, that the things which cannot be shaken may remain.
28 Therefore, since we are receiving a kingdom which cannot be shaken, let us have grace, by which we may[j] serve God acceptably with reverence and godly fear. 29 For our God is a consuming fire.
I had a death experience in 1972 never mix heroin with reds