You ask for a simple true or false , and suddenly you're parsing "Yes", "yeah", "Y", "true", "1", "ok", or my personal favorite: "success". The contract was clear—return a boolean. Instead, you get back a string that requires a whole new layer of validation logic. Now you're sitting there writing if (response.toLowerCase() === "true" || response === "1") like some kind of type-system archaeologist. Strong typing exists for a reason, people! The smugness on that kid's face? That's the exact energy of someone who just returned "False" with a capital F from an API endpoint.