Because the raw material of coffee, coffee beans, is good and bad.

Different places of origin, different kinds.

See the practice of coffee.

1\ Pick coffee fruit

2\ Remove pulp by dry cleaning or water washing, leaving stones.

3\ Naturally air-dried or sun-dried stones are coffee beans.

4\ Raw beans are screened, blended and baked at high temperature, which becomes the coffee beans we see.

5\ Grind coffee beans.

6\ You can make espresso by soaking or boiling in a press, siphon or mocha pot and filtering.

Therefore, it is necessary to use utensils to grind into powder, as well as special coffee making, which has certain knowledge.

Instant coffee is to evaporate the water in espresso by some technology, such as spray drying, leaving powder or particles. More convenient. It is also a kind of coffee, but it contains preservatives, pigments and sweeteners. This is not good for your health.

So in general, instant coffee is also coffee, which is more convenient and quick, but it tastes monotonous and has some harmful substances. No one will drink instant coffee if there is a high demand for coffee.

1 Lou's metaphor is quite appropriate, and coffee is equivalent to instant noodles. It saves a lot of trouble, but it is not good for your health.