Why do so many buffets no longer serve dinner

When I get up in the morning , last thing I am thinking about is a buffet. For me personally, it's a late afternoon or dinner option. After a small breakfast, I might not eat all day and have a big appetite. It's then that I consider a buffet. My biggest appetite is later in the day or evening, not morning or early in the day. What's up with some buffets only open early in the day.