Nothing drove this point home better as I was searching Lake Ontario for smallmouth that used to be ever present in 90s, but all but disappeared by the early 2000s. I spent weeks out there, every chance weather permitted, graphing away, looking for bites. Anyone that has fished the south shore knows it's like an aquatic desert out in the big lake, away from shore. You could go miles without a sniff of a bite. At one point, I rolled over bait so thick, I thought it was grass at the bottom of 35', but it was bait. Dropped a line over the side, and I was quickly rewarded with big smallmouth. No bait, no fish!