My children complain the wifi is down when their ethernet cable is broken. They say that AFTER THEY TELL ME IT'S BROKEN. This is not just a meme, they should

My children complain the wifi is down when their ethernet cable is broken. They say that AFTER THEY TELL ME IT'S BROKEN. This is not just a meme, they should know better, and are very unhappy on WiFi, but still tend to call all internet Wi-Fi.