Developers are too often bad engineers.

This I agree with, but would excuse it by simply stating investment isn't there for proper engineering standards. I'd love to produce bug-free tested to reasonably unbreakable, ethically implemented code every single time. But I'd be out of a job pretty quickly and replaced by someone willing to do it faster with more critical bugs and no thought of the ethical implications of a failure.

As an industry, we like to think of ourselves as supremely rational, but we can't apply even the most basic scientific principles. So much conventional wisdom has never actually been tested or proven, so we keep reinventing and flip flopping on best practices.

what is POO? Can't find a definition on google