Reading FAANG employees talk about food prices makes me realize the old "It's one banana. What could it cost, $10?" is something that was written based on reality.
The campus was really too big to leave for lunch unless you arrived at some stupid early hour to park underground below your office. It's a 10-15 minute walk to the south parking garage and then at least a 10 minute drive to the closest places to eat and none of those are cheaper than the cafe.
So unless you're bringing food from home you can pretty easily hit $20 for lunch per day. I doubt Cafe Macs is running a huge profit but the cost for employees is non-trivial.
I am used to pay at least 10 euros, for food + drink, unless I go to one of those special lunch time deals or street food places.
And since I am Portuguese, evenings is also a proper meal, so make it twice for the days I happen to dine outside as well.
In fact to this day I never gotten into the whole Abendbrot stuff, even though I have lived half of my life in German speaking countries.
Just explaining where I am coming from, not attacking anyone.