Every bit of air is spent on that one breath to blow away a dandelion
Every seed scattered will come to rest and then grow becoming a bright yellow flower that is a symbol of spring.
But do we let them all grow for wishes to be made? No. The older people learned that dreams don't come true.
So they cut down the flowers before the children can make wishes and so they can't hope that their wish, something held dear to their heart will become a reality.