Yes

Fat is important as long as we use the right ones (EVOO, VCO and a some butter is what I use with very few exceptions), and I'm sure he didn't mean to just eat protein by itself, just to include protein in every snack/mini-meal, that's the standard advice for hypoglycemics.  I'm still not even close to doing the mini-meals but I'm getting better at consuming more protein, like whey protein powder in a little almond milk.  I also like sardines and Walgreen's just had the smoked ones on sale so I stocked up because that'll make it easy for me to grab something quick sometimes without having to cook every meal.