No, it's not true. Air travel is as reliable as it is because it's considered to be a system Airplanes, their design, manufacture and maintenance. Airports, communication systems, procedures for entering, transiting and exiting an airspace, fault reporting, accident investigation and much more. All of those things are part of the "system."

What a lot of people fail to do when making comparisons with software is to look at the act of coding in isolation from everything that surrounds it. That leads to a very skewed perspective.