It's either fortunate or unfortunate, that we as human beings have evolved to the point that we can even conceive things that might be different.
As the animal kingdom discovered long before LRH, the driving cause of life is survival. We have the brains that allow us to not only survive but come up with wild theories and conjecture about continuing our existence beyond death. It's in our nature to attempt to come up with an excuse to cheat death. Instead of trying to avoid predators, our excuse to cheat death is to create any one of a number of scenarios where there's some sort of "essence" inside of us that will "carry on" our consciousness.
No human being should sell themselves short by writing themselves off as a shell of some other "being" that's at the controls. It would be tragic to try and imagine that I am not me, but merely a meat body being controlled by some other being that is truly "me" and that "I" am not "me", but merely a vehicle being operated by some sort of contrived essence. I for one, choose to embrace my humanity and make the best of it, for myself and those I interact with.
Not to sidetrack, but that's what I never really understood about the "believers" vs "atheist" argument. Regardless of your chosen spirituality, the constant argument is "Well, if we didn't have religion, why would you not just go out and rape, pillage and plunder". Total red herring, because it's peoples spirituality that causes them to kill themselves and/or others to achieve their given brand of "heaven". Had they taken a second to think that this is all there is, then maybe they would have thought twice before blowing themselves up in front of a crowd of innocent people, or invading a country that believed differently.
I don't know if any of this makes sense, and I apologize if it doesn't, but blind faith in some arbitrary, unproven claims into the human condition ( be it the Bible, The Torah, or a Science Fiction author turned savior of the human race) allow people to do crazy shit because they think that their essence will continue on beyond their petty existence here on Earth. I for one treasure every moment of my existence here on Earth, because my ability to even have this conversation is extremely special. No other life as we know it even has the ability to even comprehend such things, let alone have a civil discourse about it. We are unique like that in our little backwoods planet in our little backwoods solar system in our little fringe of the Milky Way. And I treasure every little scrap of knowledge I can devour, but in the scope of our gigantic universe, my gaining knowledge based upon what little we as peon human beings can actually know about the order of the universe is infantesimally small.
If people gain comfort thinking that anyone on the planet Earth can actually come to solid conclusions about the workings of the cosmos, more power to them, but that only goes as far as helping people sleep at night.
The universe is a huge place, and Homo Sapiens Sapiens will never know the answer because the earth will be swallowed up by the Sun long before we have the ability to work it all out scientifically.
And like LRH, I will make a proclaimation of a great discovery right now. I have researched and discovered for the first time that in order for humanity to live well, that the primary harmony of the human race is to treat others as you want to be treated. Hell, that's pretty much akin to his "discovery" that beings want to survive right?