People are trying to sleep, you know
Being hard of hearing can make living with other people incredibly difficult, especially if you’re a sports fan. The OP’s father had lost most of his hearing but would cheer enthusiastically when watching his favorite sports teams. According to the OP, the cheers from the living room were too enthusiastic that it made it hard for anyone to sleep.
As a son, you’re not going to tell your father to pipe down, are you? Well, cats have a different idea of how the household hierarchy is. The pet cat jumped out of bed, headed right to the living room, and all the OP heard was, “oh, sorry. I’ll be quiet.” Yeah, a ten-pound feline told a grown man to keep it down by staring him down.