You say that you are 100% sure that it is a reality, which is a very strong opinion. For me it has always been 60-40 and I like to keep an open mind about different things because no one knows anything and it is about probability which differs for everyone.

I am talking inferences from the real world to explain my point. We humans tend to find that happy place where everything is perfect like you described. But, when we attain that state, we are not happy with that. In this world, we admire everything about its imperfections and no one likes a perfectionist.

I just believe, we as humans have complicated thing by using our mind in wrong direction. We are just like other creatures with just more brain than them. There will surely be a next species after us, which will come into existence through us with evolution and that's it.

We can never be certain about such things or anything until we have strong evidence which we are never going to get. The universe is ever extending into infinity and no one knows its secret, and religious books claim 100%, they have figured out something beyond this universe, which for me is very hard to digest.