What "science" is there to it other than meeting a need?
Mind you, most of the people completely against that strategy don't look like bodybuilders.
I don't eat that often now because it isn't necessary. I have a solid protein source that allows me to get away with less calories.
The real advice should be "to eat in whatever way makes you grow the most"....and for many guys for a very long time, eating that often helped them do that.