Have you ever thought what Benjamin Franklin thought when he flew a kite during thunder, with a metal key tied to it? Everyone thought he was crazy and was going to be hurt, but he knew that if he succeeded, he would have invented electricity.
Like him, there are many other cases where people have to endure pain to gain something. We can’t achieve anything without hardships and struggle. One has to go through some pain to reach the specific target.
Like, if one wants a healthy body, he/she must earn it by going through the pain of the exercise. If one wants to eat, there needs to be some work done in the form of cooking. If one wants to live in luxury, he/she needs to work and earn it.