ummm, i suggest you look into it a bit further, it is fasting.
there is a lot of medical evidence to support it, its good for your body to not be digesting all the time, it allows time for recovery and regeneration etc.
look up autophagy.
just because you dont understand something doesnt mean you should just dismiss it. the onus is on you is to look it up before you speak - like i did years ago.
why do you think the word is breakfast? its literal & it means breaking your overnight fast. fasting doesnt have to mean days on end, or to the level of making yourself ill.
We as a species are not 'meant to eat 3 meals a day' - that is a societal thing, and we now just eat when we feel like it, when we feel a bit peckish, but we dont need to.
lots of things have been advised as healthy over the years and been dismissed when we learn more about things, and realise the reality, as we get better resources and research.
just like fat is no longer considered the culprit for making people fat.
We are designed to manage very well going without food for longer periods than most of us do - how do you think we managed for millennia not having 3 meals a day and having to eat when there was food and thrive when it was scarce.
our bodies are a very clever machine- do you honestly think we'd fall apart and be ill if we miss a meal or 2?
we wouldnt have lasted as long as we have if we did.