Other than it's the only thing we have evidence for. You know... that. It's quite rational to 'believe' something when all evidence we have points to it. The reverse is not true.
Which brings me to...
> The other option is that there is some unknown type of "energy" (boy, do I hate that word, BTW). And our bodies are some sort of receiver.
Ok, so test this. If it exists and has an effect it should be measurable. Guess what's good at measuring stuff? Science. So go get that Nobel or something - help design a test and study for it!
OoBE, lucid dreams, and NDE's all have very normal non "energy" explanations when you dive into anything more than a superficial level (and they are fascinating! It's a really cool area of science!)
> The second offers much more
Yes, empty promises with no proof are generally considered to offer plenty but unless you can show me actual evidence then it's just more snake oil.