Same as performance, or any other aspect of basic engineering competency. Product, or business, will never tell you, "don't use this query for this feature beca

Same as performance, or any other aspect of basic engineering competency. Product, or business, will never tell you, "don't use this query for this feature because it won't scale". As an engineer, you can take a shortcut and query the database in a way that will explode after a year of growth, after you've moved on to greener pastures. Or not.