If you wanted a nice flower garden in the front of your house, you would commit to daily maintenance of that garden, weeding it, watering it, fertilizing it, pruning it, shaping the growth, occasionally replanting areas of it, etc. Lots of work. You could also just dig it up once, buy some little pots of flowers, poke them in the dirt, and let the lawn sprinklers do everything else. For awhile you might have a pretty flower garden, but eventually it would be overgrown, full of weeds, with lots of dead plants here and there, small plants hidden among tall plants, etc. We face similar challenges with our aquatic "gardens".