Originally Posted by
OpieTaylor
Presumably because 121 is the flying pubic.
They collectively have less acceptance of risk to travel by air than an individual who owns or charters a plane.
It’s presumed a member of the public who owns or charters a flight has more control over the acceptance of risk than a member of the public who seeks public air transportation on a common carrier.
In the 121 flying public there are more unsophisticated and nervous people. They have little ability for risk acceptance and risk avoidance.