It's ok to be skeptical of anything which defies any objective analysis.
A thousand anecdotal reports or even a million are not equivalent to one tangible, reproducible result.
The idea is based on a number of assumptions:
1. That a person of some sort survives the person at death.
No proof.
2. That phenomenon experienced must necessarily be confirmation of #1.
No proof.
3. That all phenomenon experienced must necessarily exist in the external world of objects, hence must be in confirmation of #1.
Provably false. Hallucinatory experiences can be induced at will and certain activities will yield similar results, this not due to the existence
of external forces, but rather because the pathway taken to such experiences are similar and we have simliar bodies/brains and so are affected
in similar manner.
I'd recommend Charles Tart's book "Altered States" as a rational approach to investigation.
(The latter vid is for balance)