The short answer is no. The provinces, most times, focus on planting a monocultured forest that is merchantable timber. It's exactly as you said. When you have hectare upon hectare with no trees, which would normally be soaking up all that moisture on these steep slopes, all that moisture has to go somewhere, and it goes into the ground and then eventually ends up in the water.
The Nicola River, in recent years, is a brand new river. Spawning grounds that used to be there are now moved over by hundreds of metres, just because of the amount of sediment and so on and so forth that has gone into the river because of the lack of surrounding forests.
But yes, what we need is a habitat that's appropriate for that area and we need multiple species of trees, a diversity. We can't just have a checkerboard of pine and spruce.