It seems like everything we fear is a form of fear of death in some way.
Public speaking? You, alone, vulnerable, in front of a crowd [herd] of intent listeners. Alone and vulnerable - like prey - trapped and dangled, exposing your belly to a den of wolves.
Spiders? Rationally - you're bigger than it - it shouldn't be able to hurt/kill you. But damn, does it look scary. Maybe because of that reason, it's so much smaller than you and looks s'damned scary [possibly venomous] that it could pass right under your radar, and bite/hurt you when you least expect it.
If not for something having the potential ability to hurt you [and why is hurting so bad? Oh yeah, because it means something is harming you. Harming you is bad - it means you can die.] than what is there to fear?
And that ability, to accept it, to live in spite of it, is just as important as the fear we have that acts as a signpost, or an alert, to avoid the danger and possible death. To live in constant fear of death is negating life - another form of death. This is [I think] at the very root of my existential anxiety, or any anxiety, or any insecurity. Why I feel overwhelmed by the world/incapable of living in it functionally sometimes. Maybe this is why Ne/Ni are not as common as dominant or auxiliary mental processes as Se/Si, so it seems anyway, and that's if these are even real. To operate primarily through the lens of "now," to rely primarily on past experience, is important for the survival of the species, I think. If most of our species were concerned with future/bombarded with possibilites/looking for the real "meaning" behind everything all the time, I doubt we'd be as successful in that regard. Variation is awesome.

(Note: I'm not saying that Ss do not have these worries, or that Ns do not live in the moment or ever rely on their past experiences, or think about the
same possibilies in the
same ways, that produce the
same effects. I'm saying that the likelihood of one doing one most of the time as opposed to the other is greater, provided CF theory has some merit. Also, this is totally some kind of fallacy. I forget the name. I'm just gon' throw it out there anyway as something to think about, maybe.

)
But, I could just be talking out of my ass/making that all up.
That being said - yes - I'm petrified of dying. The uncertainty of the method coupled with the certainty of its inevitably unsettles me to my core. There is NO OTHER WAY, this is
GOING to happen, and I do not know how, or when. It feels like some perverted mass torture, as silly as that sounds to say.
I really admire people who can accept this. The whole "Everyone dies" or "Well, it's inevitable, why fear it?" reasons that people give, are precisely the reasons I fear it. Yes, everyone dies. That means I have no other way. There are no other options for me. I'm going to die and I can't do anything about it. But the whole "meaninglessness" issue was much harder for me to deal with when I was younger. I imagine most, if not all, people deal with that at some point. I don't know why it was so hard for me (and it is wrong of me to assume it is not this hard for everyone, I realize. It
feels harder for me, is what I mean.) I can't accept it, so I've had to learn ways to ward off thoughts about it so I don't have to deal with it at all. Maybe someday I will be able to just accept it, and live productively and meaningfully in spite of it. I imagine that's what we're all trying to do in some/our own ways.
/agnostic atheist and incurable idealist