People are bad at understanding risk. Tell someone that this change will save the company enough money to bump the share price by $2, but there's a one-in-a-million chance per flight that it will cause a crash that will destroy the company instead. Do you go for it? A lot of people will hear "one in a million" as "basically impossible" and say it sounds great. They'll probably rationalize it further by deciding that you're being paranoid about the risks. And then a while later you have a few hundred dead people and a company with a shattered reputation.