I use metaphors far too frequently in spoken conversations, and I have learned that it’s often more effective to cut bait (there’s one!) than to try to transition to a new metaphor mid stream of consciousness.
So they are useful, but I’ve noticed weakness in using them as well.
Yes.. I agree to the example and reasoning in the article, but on the other hand metaphors can simplify things too much, and even tell lies. E.g. politicians using them is the prime example. Thus, not convinced...
"Cut bait" isn't really a metaphor by this time; it's more an idiom that is based on a metaphor. It comes from "fish or cut bait", that is, either do one thing or the other. It means to stop being indecisive, to come to the point.
Sometimes a metaphor doesn’t make sense so you might abandon it for another rather than trying to stretch it.
Sometimes when fishing you catch something your rod or skill level is not capable of reeling in. So you are better to cut the line/bait rather than lose your whole rod.
Two distinct expressions that happen to share words. Is how I thought of it. Certainly in the context of the OP it seems he is not presenting an either or but a change course.
So they are useful, but I’ve noticed weakness in using them as well.