I feel like I'm back in Statistics lessons!
I'm actually pretty sure the chance of a plane "just crashing to the ground mid-flight for no reason" is 0, or however you express absolute impossibility in odds terms (I didn't pay enough attention in those lessons). There always has to be a reason. If everything and everyone is operating normally with no issues, physics won't let it fall out the sky. And quite a lot can actually go wrong without the plane spiralling down. Which is uh, quite reassuring to me in one sense. It means that when I fly, I only have to fixate on every other reason (than nothing), that we're going to crash into the ground/oceon...
I wouldn't fly in or out of Egyptian airports right now unless it was an absolute necessity. I would be too frightened. If someone else would fly in and out happily, I wouldn't think that was a problem. We all judge risk differently, have different attitudes, different lives. Lots of flights take off and land safely in Cairo every single day (and if you do choose to fly OP, I recommend monitoring your airports on flight radar 24, I find it very calming watching multiple flights take off and land safely when I'm worried). I agree it would be a boring world if we were a homogenous mass who all acted in the same way. I have to plan things taking into account my anxiety, which has quite a big impact on my life day to day, and that's a very big reason I wouldn't transit through Egypt, but that definitely doesn't apply to everyone flying there.
I'm not reading much of the media coverage right now, because after the first facts are known, it goes straight into pointless and potentially very innacurate speculation and repeated soundbites. Or from other sources, conspiracy and the truly astoundingly ridiculous. I'll pay attention when the crash investigators produce their own facts and conclusions. In the meantime, I will watch the Daily Show clip of Jon Stewart calling CNN on their particularly ridiculous plane crash coverage...