People used to think like this: “If machines took care of daily work for us, we could spend time on what we want do.” Time has passed. Housekeeping and simple works are done by machines. We don’t need to prepare water and firewood. We don’t need to use carriages anymore.
Manufactures may warn what they think danger, but they don’t always consider users to judge how danger the product is, or they don’t always warn what they have to. (Photos are not related to this article.)