This is the key reason. Because software products are compiled black boxes, and there is no logical way for a 'software construction building code' or the exist

This is the key reason. Because software products are compiled black boxes, and there is no logical way for a 'software construction building code' or the existence of an 'independent outside-the-company software infrastructure inspector" to exist the industry must develop these roles and must empower them to enforce a structure that the line working developers are not paid to prioritize. It is an extremely tricky mess, of the nature Nobel Prizes in Economics are awarded.