Why progressive tense was used in here?
Answer from a Native speaker
Progressive tense is used in this case because she is speaking to people in general, and not to anyone specifically. When describing a general action that didn't actually take place but which could apply to people or situations very generally, progressive tense is often used to express the continuation of that action. It also helps the listener imagine they are participating in an action that is still going on.
1/2 STEP LEARN