If you spend all of your life assessing and apportioning risk to all of your activities you would never get anything done. Yeah flying can be risky for a variety of reasons, so what? If we all stay in bed all day then the chances of being killed in an air/road/rail/sea accident are significantly reduced.
You don't have to analyse it to the nth degree. Just accept there is some risk involved as with all adventurous activities. Then decide to do it or not do it, it's not a hard call to make.