A lot of fish keepers are unwilling to have live plants in their tanks and in this case fishless cycling is better than fish-in cycling. For many new starters, it is complicated enough without having to worry about keeping plants alive as well, so they prefer artificial plants. For many years every plant I put in my tank died so I gave up trying. I even killed duckweed! It was a long time before I found I could manage to keep Java fern alive.