Death is the end

I don't know about the other three, and I think there are many reasons, but you can definitely consider a reason that goes something like... "why am I even having this experience?"

I don't know the answer to that, and taken together with my own research, that's the main reason why I remain open minded on what occurs when I'm irreversibly dead. Seeing as nobody actually living seems able to tell me what happens when I die, that's the most logical position to take from my point of view.

I agree with you there are many reasons but those are the main three I could think of why people believe in an afterlife. Religion has been a very important factor. It is also obviously very common to fear death as we get to old age. The belief in an afterlife is comforting and acts as a psychological coping mechanism. I am not bashing people who believe in one.