> Even mediocre food is still functional, and usually still enjoyable.
That's not even remotely close to being true. Plenty of people would order a $25 dish at a place and not like it. Not finishing the dish, or throwing a way a half eaten candy bar or bad-tasting-$6-cup of coffee is very normal. Plenty of (if most) food is meh or not enjoyable. It just serves a purpose and fills you and you move on.
I can't speak for others, but it is absolutely true for me. If I spend $1-3 on some item of food and it is so bad I can't or don't want to even eat it- it is pretty bad... and I am incredibly bummed out over it.
If you're routinely buying and throwing out $25 plates of food, then you're in a different income bracket than many people. And then, yes, avoiding a $3 app is more nonsensical than for most.