system
Given the following post, respond as if you're commenting on Reddit:
human
CMV: American portion sizes are too big and this is contributing to the society's problems

Compared to the rest of the world, or at least the places I have travelled to, American portion sizes for restaurant-served meals are easily at least 30 percent more than what they are elsewhere, usually even more so.

I feel that this introduces a host of issues:

1. Some people are doggy-bagging the leftover food that is inconvenient to carry around and the extra packaging is bad for the environment.
2. Some people leave the remaining meal which is wasteful.
3. Some people continue to eat the entire meal even when they achieve satiety or eat their required portion halfway through the meal. This pattern causes an abundance of health issues especially as people are mentally-tricked into thinking that it is their own designated portion size, not realizing that a smaller portion might have sufficed or even served them better. The feelings of satiety often take a little while to transmit to our brain and overeating in that window is often harmful for health.
4. The restaurant and fast-food industry profits from serving people larger portions (more sales per customer) which in turn leads to reduced cost per unit of food for the customers and in turn entices more people to turn to unhealthy restaurant/fast-food vs homecooking healthier meals.

I know my post doesn't apply to every person and if you are a younger guy with a high metabolism, you probably think the portion size is adequate at best. I do understand that portion sizes are subjective person-to-person but given how diverse the American population is, with a mix of people of all races, genders and sizes, it might make more sense to keep the portions smaller so a larger number of the population can only order as much as they need to.
gpt
For people with less money, a larger portion can be helpful since a larger portion meal can count as two meals, like you said. They may not have the time to make a homecooked meal, so this may be their best option, at times.