Why are servings in fine dining restaurants so tiny?

Question

I could almost eat the whole of it in just 3-5 bites.

Answer 1

In fine dining restaurants, dinners often consist of many courses made of the finest ingredients. Because those ingredients are the best, the portion that is served to you is equal to the cost of the dish (or dishes if there are many courses).

Answer 2

Coz there are always McDonalds and Pizza places to pig out.

Answer 3

the quality of the foos is much higher, people that tend to eat in those type of restaurants tend to spend a lot on many courses to tatse a variety of food