What you are claiming is in no way observable reality - I would argue it's hocus-pocus.
We, the conscious us that we identify with and that can experience the world around us, only exist because of elaborate and complicated arrangements of matter and electric signals firing inside us. When we die, those arrangements break apart and those signals stop, hence we - in ever meaningful way - cease to be. And that's absolutely fine. That nothingness means there no bad things and essentially there is rest.
Yesterday someone died. Today something bad happened.
Not everything is matter. Not everything is detectable, observable, measurable etc.
Most of the universe is unseen.
Your thoughts are unseen.
People who have more right to have claims of the truth of the world are the ones who have studied time
in depth. By that I mean they study what their creator has sent down and he knows all about time. By you saying you only believe in a physical world or what can be seen you are jumping to dangerous premature conclusions.
By the way, did I just read correctly when you said that it's not an observable reality in my example that there is life after death? So those leaves didn't die and then new leaves didn't grow back in their place?
Just to clarify, I'm not saying we are leaves. I'm saying God put many signs for the reflecting mind about this matter and he leaves it up to you to do your journey. They actually do live in their own world by the way if you look closely. Trees are living. He just made us a higher type of creation but we are subject to the same reality.
That's why I mentioned "observable consistency".