You, an engineer at a major aircraft manufacturer that isn't Boeing, have been working after hours with some of your colleagues on a hobby project to add some modern safety features to an older model of small private plane, because you regard it as unsafe even though it still has a government certification and you got into this field because you want to save lives.

Your "prototype" is a plane from the original manufacturer with no physical modifications but a software patch to use data from sensors the plane already had to prevent the computer from getting confused under high wind conditions in a way that has already caused two fatal crashes.

Now you have to fly somewhere and your options for a plane are the one with the history of fatal crashes or the same one with your modifications, and it's windy today. Which plane are you getting on?

Those people on the boeing flights would have appreciated a little more of the correct motivations.

Instead they got McDonnell Douglas'd

As it turns out the motivations matter way more than you might think.

Flying in a plane you built yourself is likely safer than flying in the same model of plane built by a company that assembled it for you using lowest-bid labor while making you sign a twenty page lawyer barf disclaiming liability.