Scissors, bricks, kitchen knives and roasting trays - all could ultimately kill you under the right circumstances. Are you afraid of those as well?
The question isn't really what can make you die, but rather what is likely to make you die and under what circumstances? To be afraid of a circumstance which is likely to kill you makes sense, to be afraid of one that is not, does not.
So if you are afraid of being 38,000 feet up in a plane because falling 38,000 feet would kill you makes no sense at all because the probability that that happens is so small that you shouldn't worry about it. Same with heights unless the circumstance warrants it.
Basically, sounds like you are all pussies.