Because you can break your fast whenever the fuck you want. 40 days of fasting are perfectly safe for any typical young person.
If you experience ill effects from not having breakfasts, its either because you ate way too few carbohydrates the day before, which is of course not a crime or anything, but your carb store lasts easily for 24 hours, if you are not riding bike all day long, so if you fill it up in the evening, you dont have to eat for a whole day and wont even burn much bodyfat in that time, because you have plenty of those carbs around.
Or its because you have dirt in your intestines from eating indigestible dirt the day before and your body is craving food or rather fiber to help push that dirt through because its just rotting there.
Or its plain food addiction, there are too many of those to discuss them here.
Or your body is so fucking toxic, that you cant endure the detox experience that kickstars when you are fasting, so you have to eat all the fucking time to not get headache or similar shit.
Or you have blood sugar management issues, because you fucked yourself up eating too much fat too often, parallel with eating carbs and now your brain is insulin resistant and not receptive enough to your fasting blood sugar, meaning to your liver-stored carbs from yesterday, or you had too much insulin and your fat cells sucked away too much of that fasting blood sugar so its way too low.
If you eat the food that is natural for your physiology, fruit and lettuce, then you will eat irregularly, depending on your demand. Sure, there will be typical rhythms. Most people, who eat the natural food for their physiology, tend to eat two meals per day, typically both of them later in the day. But the rhythm is not a rule. Activity depletes the carb storage and determines when one should eat again. Many people would also eat several unorganized meals or snacks in a short time window, however long it takes for the body to absorb all the food for the day or rather all the carbs that fit into the storage, so its like one long feast every time the storage is empty. This can only be done with hydrated food with soft fibers, namely fruit. Other food would cause indigestion and bloating. I guess it could also be done with processed food. Like sugar water.
People who are underweight or depleted will often crave eating earlier, because this helps the body to not loose weight and for lean people that can be a struggle. But obese people who hope to burn fat fare better, when they eat most of their calory restricted food in the later day, which means that in the morning they will not interrupt their energy mobilisation chemistry that is build up in the night and lasts until the fast is broken or until nerve energy is depleted - which doesnt happen for a healthy person, but happens frequently for a caffeine junky, which leads me to a very important reason i forgot for why people crave breakfast: Whenever you drink that morning coffee and your adreenals are also rather fatigued from a general lack of sleep you will quickly collapse and crave sugar. Also if your coffee was very acidic, you may crave food to neutralize residue in your tummy.
The ideal time to eat is whenever you are not too active to digest food, either physically or mentally, because both energies compete with digestive energy. This is especially relevant when you eat difficult to digest foods, meaning not fruit or lettuce. Many people like to be active early in the day and lazy later in the day, so later in the day is better for eating. The other ideal time to eat is when you have a blood sugar crash or when your muscles have bonked and you need to use your muscles, so you have no choice but to take a break, eat, digest, ride on.
See, all the anecdotal wisdom you hear generalised to folk wisdom is terribly relative to everything else people (commonly) do, because your food stays in your body for possibly several days and shapes your whole experience and performance, such as insulin sensitivity, degree to wich storages are filled, much more. Natural hygienists understand how the body actually works, how its all relative.