It is very easy to write good software. There are countless schools, books, courses, videos, blogs, and consultants whom would tell you exactly how. However no one ever teaches how to write bugs!
In my long and winding career I witnesses, sometimes closely, sometimes as close as oops-my-fault, some colossal, famous, impactful, surprising, and simply downright embarrassing bugs. I learned a ton of lessons from those, and it’s time others will learn the same lessons, without paying the toll.