Being able to see where and how well the fish is hooked is relevant to how much drag pressure an angler may choose to put on a fish, and how much pressure the wire man exerts on the leader before pulling the hook. Many times, I’ve spotted the brightly colored heat shrink/tape as it revealed a foul hooked fish or a fish hooked solidly in the jaw but wrapped up in the leader and fighting like a fouled one. Also, if the lure happens to take a bad hop, sometimes the hook will hang up on the leader in front of the lure head; a brightly colored hook set will alert you to this problem. I always designate a specific color of heat shrink/tape to a specific size hook set. This keeps the lure and hook set combinations organized and consistent when re-rigging lures in the middle of a hot bite. Finally, brightly colored heat shrink/tape can add a bit more color or contrast to any lure.