Why is it when a person makes a post that doesn't have any question marks in it, others feel obliged…

Why is it when a person makes a post that doesn't have any question marks in it, others feel obliged to still treat a statement like it was a question? Lol like someone can say 'my cat purrs so loud' and then a "cat professional" comes in saying 'maybe you should try giving it some water to soothe it's throat so it doesn't get tuberculosis from excessive purring'