Even with no steelhead harvest there is salmon harvest. As the late Jeff Cederholm said "Salmon are Habitat".

Just saw an article about steelhead in a stream in Idaho. The stream gets a lot of water from a sewage treatment plant. The nutrients in the wastewater do, at times, exceed Clean Water Standards. That stream has the densest population of juvenile steelhead in the whole watershed. The fish populations are starving. The functional system had salmon as the prime source of nutrients for the whole watershed. Much of the base rock in many of the PNW watersheds is sterile; the anadromous fish-salmon, sturgeon, smelt, lampreys all brought nutrients back to the streams.

Until we fix the system, and that includes streamflow, access, riparian cover, plood plain, and spawning salmon we won't get anywhere.