It is a small sacrifice for a possible long term gain, as Jimmy has stated. The gain can only happen if every interest group stops pointing fingers and starts developing solutions.
The problem for guiding companies with closures like this one is not so much the closure itself, but the publicity it generates. Fishermen have a tendency to exaggerate as we already know.
With the aid of media, we are already painting "the end of the world" picture before salmon have even arrived. These are pre-season forecasts and precautions. While most likely we will indeed see low returns of early season Fraser River chinook salmon, it does not mean the remainder of the salmon season is a write-off. Guides and lodges do most of their advertising overseas, so the message "no salmon fishing before mid June" can often be mistranslated to "no fishing at all" by the time it travels 5,000 miles. Successful guiding companies in the valley actually do not market their product with salmon. The primary target species are white sturgeon, trout and char. Western Europeans who come here to fish have no desire to either be standing shoulder to shoulder for a few salmon, or sitting all day for the bar rod to go off. They want to get big white sturgeon, fall salmon, experience the river flyfishing with results that they never get back home for the same amount of dollars they spend. Good salmon fishing is often just icing on the cake for those whose trips here just happen to coincide with a good push of chinook salmon in the summer.
For those who live in the Lower Mainland and Fraser Valley, a six week delay in chinook salmon fishing should not discourage you. The mainstem Fraser River will be experiencing freshet, fishing is generally poor in the first place. May and June are two fantastic months for interior lake rainbow trout fishing with fish in the 16 to 24 inch range. Locally, bull trout fishing is at its peak in the Lower Fraser tributaries. There is also white sturgeon fishing. Urban trout lakes will be regularly stocked for families. In the saltwater scene, salmon and groundfish fishing is available, as well as crabbing. If one truly wants to fish for salmon during this time, the Capilano River offers coho salmon fishing during this period. The only true opportunity lost is perhaps the creek mouth fishery for chinook salmon, but again it is a small sacrifice for a possible long term gain.