When used properly, metaphors enhance speech. But correctly dosing the metaphorical spice in the dish of language is no easy task. They ‘must not be far-fetched, or they will be difficult to grasp, nor obvious, or they will have no effect’, as Aristotle already noted nearly 2,500 years ago.
Many people assume they are bad at writing because it is hard. This is like assuming you are bad at weightlifting because the weight is heavy.
Writing is useful because it is hard. It's the effort that goes into writing a clear sentence that leads to better thinking.