Too true - in this life it's good to be not too sure of anything because often we are wrong about everything. In the end it doesn't really matter to our everyday lives if you or I believe one way or the other...
Believe is the key word here. This is impossible or nearly impossible to prove, so you can believe whatever idea you want. It just isn't science.
My personal beliefs are similar but I do expand it to the cosmic stage. I can't answer "why is there something rather than nothing?" But as soon as something exists, either through luck or some plan it does everything it can to ensure it doesn't go back to nothing.
