That is not true of all NDEs. In some there is total brain death at the time of the NDE.

Of course I am not saying that we should all sit on our hands and merely await the afterlife.

But the idea that our brains contain our consciousness has numerous flaws.
Our brains could never contain a long-term memory system, for example, with infinite storage. It’s a pure hardware problem. Memories have no specific location in the brain - although the long term memory system itself can be faulty or stop working, one particular memory itself has no location. They have tested rats who have memories of navigating a maze. They attempted to remove parts of the brain to remove the rats ability to navigate the maze. But at a certain point most of the rats beain was gone and they still remembered the maze.

The brain appears to be holographic, with part of its information being stored outside of the specific hardware of the mind.

Of course there’s the fact that we haven’t- and in my opinion will never - locate the source of consciousness in the brain.