Hatcheryfish and wild fish are completely different. You have removed the natural selection process from the hatchery fish even if they came from wild stock. So you do not know what they will be passing on genetically.
Hatchery supported fisheries in systems with wild stock are present is the worst thing that can happen to wild fish in that ecosystem. It will wipe all of them out when is the only question. The only thing that keeps the hatcheries open is the pressure from political groups and state and federal orgs protectiong their empires. If we really wanted to preserve wild strains they would all be shut down and all hatchery fish killed.