With what you have learned about safety-critical systems, do you feel safe flying on a plane, driving or riding in a car or bus, and/or riding on a train?

“What is causing Boeing 737 max 8’s to CRASH?”, “An introduction to critical systems,” and/or “Critical systems engineering.”
Now that the Boeing 737 max 8s all have been grounded, the recent crashes and why the crashes happened have disappeared from the news. There are many variables — mechanical problems, pilot error, software glitches — that could have played a role in the crashes. Think about these complex systems and answer the following questions.
Given that many variables besides software problems can impact a safety-critical system and cause it to fail, do you think that any safety-critical software can guarantee 100% safety?
With what you have learned about safety-critical systems, do you feel safe flying on a plane, driving or riding in a car or bus, and/or riding on a train?
Would you fly on a Boeing 737 max 8? Would you fly on one after they have identified the cause(s) of the crashes?