Most people? Most people? Are you somehow a better fortune-teller who knows what transpires at "most people"'s tables?
I cannot even comprehend "next drink order or restroom". Waitress just set down my main course, hot and ready to eat, and I don't know where the bathroom is? Didn't I wash my hands on arrival, or just after ordering: here's the menu back and please direct me to the restroom? The waitress is literally asking if she can bring me something so that I can begin eating. That means: condiments, utensils, send this plate back it's wrong. If my drink's empty, she proactively points it out and offers a refill. She wants to know if she is gonna return to this table, or if she's done and she can serve others now.
This is an objective experience. I can promise you that I'm not being unreasonable about sauce or bread. It's not a matter of drowning food or trying to use more sparingly. There is always objectively less than half as much sauce, as food to put it on. I have literally argued with waitresses about how much sour cream to bring out for potato skins and they seem simply forbidden to anticipate that. They will come out with 1.5oz instead of 1 and point out how much bigger the container is... when I need 3oz or more just to finish the plate.
Or in a Mexican restaurant: fajitas or some other DIY dish, comes with tortillas alongside it. The customary method is to scoop the fajitas into a tortilla and make your own tacos as you go. But there are 5 servings on the plate and only 2 tortillas. The math ain't mathin' and there is literally no way to fit in a skillet full of fajitas in 2 of any size tortillas.
That Ethiopian restaurant knew exactly what they were doing. They gave enough injera to eat a little bit of the meal. The injera is your utensil, and you cannot eat Ethiopian food without it. Imagine if you gradually ate your fork during a meal and your fork disappeared 1/3rd of the way through it. You would probably ask for 2 more forks. That is injera in action.
How do you know that "most people" would never finish 2 tortillas? Do they just like, stop at 1 tortilla and 1 scoop of fajitas, and then tell the waitress to just trash the rest of their meal? I cannot comprehend this assertion. Often, running out of tortillas just prompts me to start eating with a fork. It's not wrong, but it's not customary Mexican dining: you put 'em in the tortillas because that's what tortillas are for, and tortillas are overflowing endlessly from every metate on the planet.
They know how to spam you with food, because the free tortilla chips know no bounds, and they'll refill your soda without asking first, but somehow it takes an Act of Congress to put down adequate, complementary servings of tortillas. It's fucking obvious.
No. When I finish half of my potato skins and the sour cream runs out, then I ask for more, because the full plate of potato skins is what I paid for off the fucking menu. I want to finish my meal in a normal way, please. I fucking ordered enough food to eat and I didn't order 3x as much so that they can throw it in the fucking garbage when I leave. I will do the tortilla dance and keep asking for tortillas until I finish the fucking fajitas plate because I paid them to eat in the customary fashion, and they know exactly how it works.
Restaurants do care about this charade, because if the diner sits at the table asking for more bread, they'll probably ask for more cocktails or dessert, and they'll consider raising the tip. More time spent dining, and asking for more, is profitable for them. It is profitable to over-serve large portions for the main course, because it looks generous, feels satisfying, and it doesn't cost much more to do so.
And again, this absolutely craps out when they wrap it for delivery, it gets to your door, you run out of sauce and/or bread, and you indeed trash 2/3rds of the fucking $60 meal because it's not worth eating incomplete food.
And yes, I do mean to be fucking rude, when I get second-guessed like that.