Why take a similar attitude towards the after, though? Just because I do not care about the past event does not mean the future event is not something to worry

Why take a similar attitude towards the after, though? Just because I do not care about the past event does not mean the future event is not something to worry about? I don't care about the past event as 'I' did not start to exist at that point, but now that I exist I enjoy all the parts of life. I keep trying to think of a good metaphor, like: "I stubbed my toe years ago, but I didn't care that much then, but I still don't want to have it happen again." but that doesn't entirely fit with reasoning about nothingness. I am not freaked out by the 'before' as I did not exist then, and while I won't exist after my death, I exist now and can fear the end of my own existence.