You know, it's funny Abaya, I get carsick when I'M the one driving too LOL: go figure! But ultimately, we (or most people) are fine with driving precisely because they are in control and at the very least, feel they have a chance to avoid/prevent/defense against potential accidents. We're always convinced it's the other guy who's a crazy driver, not us. Contrast with flying, it's pretty much a one shot deal: most plane accidents you don't walk away from and if something happens, it's COMPLETELY outside your control. There's no "Look out!", no swerving, no slowing down, no nuthin' generally speaking when it comes to plane accidents. So even though air travel is very safe, so much more than driving, the few accidents are so gruesome and shocking, we are psychologically inclined to fear it or have anxiety over it.
I think Abaya you may be on to something as we get older we may think of these things more or at least, mortality in general. Strapped in ready for take off, we may think, oh boy, is this it? I hope those union workers were thorough in the pre flight check up. Plus all the sounds of banging, whirring, clicking latching and we can't really see what's going on just adds to the anxiety.
There are other aspects too for some people I would imagine. Issues of faith, latent anxieties long buried or repressed, and these should be explored in a healthy productive manner.
While you may still fly on, there is still the unresolved issue of the fear. It's that anxiety that should be explored and hopefully "resolved" so that you may once again enjoy flying.
Just my $.02