More reasons.
You don't have to procure seeds
The plant will continue to get better for a few years, albeit slowly after the first grow or two.
You know your genetics and how to grow it every time.


Now, the cloning can be done with another domed tray and inexpensive light. Grow it out enough to clone it again, and continue until you have the first one done allowing for the previous to move to flower....perpetual garden, the only way to go.