Everyone of us has to likely drive in our cars daily. There are many people driving on the very same roads that are...
-not paying attention
-extremely depressed or despondent
-intoxicated or high
-severely stressed out
-coping with untold distractions in their car
If we really were aware of the amount of cars/trucks on the road being driven by these sorts of drivers we would likely never drive again. About 100 people are killed each day in the USA in auto accidents.
Everything we do has risks. Flying is not just safe, but amazingly safe. We should all understand that the efforts needed to make something that is already extremely safe safer yet may have substantial unintended consequences and disproportionate costs. Personally I see little reason to change existing safeguards except at the margins and only after thorough analysis and reflection after the initial emotional reactions of the event have passed. I say this as a member of the flying public and not an insider. I am not making lite of this tragedy, I fully understand the loss of life and the devastation to the families involved.