I think PP suggesting alternatives are sort of missing the point of a takeaway.
You need to have ready meals in the freezer/fridge to be able to just chuck one in the microwave. And to be fair, a large proportion of ready meals are utter shit and taste grim (and they're tiny).
Doing something basic like toasties or omelettes etc is relatively simple but when you've got to do them for the full family and you're already knackered, it's not actually that quick and can be a faff. And again, you might not have enough eggs for everyone, toastie fillings etc, especially if you're due to do a big shop.
Sometimes you just want to order food and have it brought to you. You don't have to think about what's in the fridge/freezer (which honestly I find harder than the physical element of cooking).
But you're not wrong OP, takeaways are bloody expensive. I have two teens and it ranges between £45 to £70 for us (£70 was Five Guys with milkshakes for everyone - a big treat).
We might stretch to a takeaway once, MAYBE twice a month if we're feeling flush. It's probably a good thing tbh, because obviously they're primarily shitty junk food.
I remember saying to a chef friend years ago that I'd happily pay for someone to do delivery on a decent meal - even just sausage/mash/veg type thing - for the nights that I'd worked late and was too shattered to cook for everyone.