Why would growers find it advantageous to produce an enormous series of identical clones, rather than using trees that reproduce sexually?

All the bananas we eat come from trees that are produced through "cuttings" — a stem from an existing tree is planted in the ground, resulting in a new tree. Thus, each tree is a clone of another. Explain in 200 words why would growers find it advantageous to produce an enormous series of identical clones, rather than using trees that reproduce sexually?