Was it that it was a British thing to do and when we crossed the pond we threw it out? Come on you know George sat in his favorite chair in Mount Vernon with a nice stout in hand. Imagine that; Martha walking by seeing George's cup empty thinking , You're already on your second one George?, heck no the man was a general! She called to the kitchen and shouted, friends he's out again!
Here's a fun article about good old George and his Beer.
So beer was originally for breakfast because well water was horrible, carried these killer bacteria and people knew it was bad. So the solution Brewing and fermentation. I mean you could just pour yourself a glass of Airag which is a delicious glass of fermented milk, I'm guessing it tastes like the way I'm saying the word in my head (Eh - Rag). Personally I'd rather pour a glass of Chicha de jora which is drank in the Andes, you can already guess from my enthusiasm its almost a beer. As great science fiction movies would say "Would you like to know more".
I could keep going and who knows maybe I will do the history of beer as breakfast in the future but for today's point, get over it! Grab your favorite stout be it coffee or otherwise, sit back with the paper on whatever day your weekend may be and cherish in the fact that you're celebrating history and not breaking a single rule for life.
Enjoy your beer, enjoy your life!