I used to wonder the same thing. Then one day at Fork a guy ran on pad right by us. My buddy cussed him and threw his C rig at him as he sped past. The bait literally landed in the bubbles from the prop wash. He picked up on the bait and a fish had it. The fish went 8.89. The water could not have been more than 6 feet deep!
I believe it. Sometimes I can sit on a spot without a bite until a boat cruises by or over them. Then tap tap.
I've also smashed my boat almost on top of bass....in 2 ft of water and punched mats directly underneath the boat and within a foot of the sides of the boat and caught great fish. It was even a winning pattern for me one weekend. I could have won that day with a 4 ft cane pole. No casting all day.