I wonder if you actually read the story. The author displays incompetence in technology administration at multiple steps.

From committing the basic design error of using hard-coded credentials at all; to committing them to any kind of repository; to failing to check on the visibility of that repository; to giving those credentials privileges they did not need; to failing to act effectively on warning messages.

And all this, apparently, is laid at the feet of Visual Studio.

I have no love of the Microsoft ecosystem, but the author does not acquit themselves well in this incident. The arrogant claims of seniority in the opening paragraph seem ironic in this light.