That fact is. It takes a lot more personalities of salmon than steelhead in the pool to trigger a taker. A key is to look for good populations of fish. A really good chum pool may not hold chinooks worth a darn. Each species has their own preference of holding water.
Every pool has area where salmon bite best.
This is taking water. It may be a depression in the tailout, a little boulder patch below the riffle, a slot along the bank. Look for these. The reason some anglers become really good is because they fish a lot and they pay attention to taking water. These streamy areas will generally outfish frog water.