Only if there is a way to keep the knockback?
Right-click to cast it: knockback.
Left-click to cast it: dragback.
I actually would really like this feature, as I tend to you use the fishing rod in both forms, though it only works halfway in its current state. My key use of the fishing rod is to disrupt a players' movement, and this can be used in many different situations. In water, to knock someone away, on land to cause a small amount of knockback and a disturbance of their sprint in order to get a few extra hits and avoid crits, and, finally, to stop people from running away. I do actually hit people with a fishing rod when they are running away from me on land, and this is actually a really useful tactic, but it only works halfway. As it currently stands, you can disrupt their sprint and thus have the chance to catch up, but the true purpose is to bring the two of you closer together, which would be really nice if you could actually do. It would also allow for some really advanced PvP tactics, with drawing someone in with the fishing pole, using the surprise to dart behind them, getting a few hits, and knocking them away when they are able to recover. The more versatile a weapon is, the more it offers to PvP, and frankly I feel that the fishing pole needs some more versatility.