I always end up saying how hugely individual and different we all are potentially, metabolically speaking.
I have a huge amount of respect for the energy that food provides. How much food you need for how much energy to get tasks etc done seems to be very individual. And very often runs in families.
I am skipping breakfast and going for a late brunch as a way to help keep my insulin levels down to healthier levels (also called 'window of eating' IFing isn't it?) But I do not schedule physical work in during the mornings for this reason, and need a serious keto brunch and a decent wee energy giving afternoon tea in order to do serious physical work mid to late afternoon and early evening (it is the warm season where I am). I too do a bit of caregiving for my 'super ager' vascular demented mother, and absolutely cannot do any of it without my morning coffee with a dollop of high quality cream in it before engaging! This sort of thing, I believe, is perfectly normal, when it comes to food and drink and attending to people and physical tasks.