So flying in a plane you built yourself is in fact safer than flying commercial because the motivations line up. Got it.

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?

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.