Hmmm...technology produced nature vs the real thing

So San Clemente, California has built a 175 acre kelp forest to offset the impact of their nearby nuclear power plant, which might destroy nearby natural kelp forests and the marine life within them. Just seems like another humans vs. nature issue. Why not conserve natural kelp forests and re-think/re-work/re-create ways to keep our natural environment safe, without thinking that our technology is a fool-proof option in creating ecology?