Earlier quoted context omitted.
I shudder to think about the security implications of everyone rolling thier own software. I trust my OS/browser/file system is secure because thousands of people are invovled in a complex network of interests in keeping it secure, from the kid contributing his first bit of code to the PHds at NSA writing encryption standards. The idea that any one person can replace that network is laughable.
Just to be contrarian, perhaps some measure of risk is reduced by the scale of one. Identifying a vulnerability that can be exploited against many thousands or millions of targets is perhaps more attractive than a single one of individually low value. This of course would assume that vulnerabilities are in fact unique (which is admittedly questionable).
(Appreciate your counterpoint for its own sake. It’s an interesting idea.)