I guess to me, that didn't seem like a 'proper' breakfast.
I know some very 'chaotic' families, with 4/6/10 DC's - and they ALL have breakfast every day. Of some sort.
Where ARE all these people who aren't giving their DC's breakfast?! I have lived in some dodgy areas, known very chaotic people (was chaotic myself for years!), yet I can't think of ANY of them who didn't have bread, milk and cereal in the kitchen, and either tell their DC's to go have breakfast, or make it for the younger ones.
Most 7-8yo's can use a toaster and butter bread, most 5-6yo's can do a bowl of cereal.
I really haven't met ONE parent, through ten years of school runs, five houses, four primary schools, that doesn't either make breakfast for their DC's or have breakfast stuff available for older DC's and tell them to go and get it.
And some of the areas I've lived in meet the EU descriptors for Deprived areas, one was one of the most deprived areas of the UK.
I'm baffled tbh, that there really are people out there that won't even attempt to give their DC's breakfast.
DD has always hated eating until she has been up for two hours, so used to eat very little for breakfast. Now she will eat in the morning, but only ever either a Philadelphia sandwich or a honey sandwich with a drink of fruit juice. She takes a piece of fruit and a breakfast bar (she's into those cardboard belvita things) for morning break.
I get that some DC's might not eat well in the morning, it's taken me ten years for it not to be an argument with DD, but to not make them breakfast OR provide food so that they can make it themselves OR chucking them a couple of cereal bars and some fruit on the way to school seems hard to get my head around when I haven't ever known ANYONE not to IYSWIM.