I don't think that it takes the fun out of the hunt at all. Anyone can troll around with their side or down imaging and mark fish all day long. It takes a real fishermen to present the correct bait to those fish and get them in the boat. Of course, sometimes you'll stumble on fish that will hit anything you throw at them, but luck is just another part of fishing, with or without electronics.
Look at it this way... Just about every pro that fished last year's Bassmaster Classic had some form of side and down imaging, but there were obviously those that caught a lot of fish and those that caught none. There's a reason that KVD demolished just about everyone else in that tournament, and it's not because he had better electronics. He knew what the fish were doing, what they were biting and what presentation they wanted. My point is, there's a lot more to catching fish than simply knowing where the fish are or might be.