Does 'show' not 'tell also count for non-fiction like a speech or only fiction?

I am trying to figure out the style of writing in Virginia Woolf's speech 'professions for women' and wondering if she 'shows' instead of 'tells'. Also is there anything else she does in terms of her style of writing that you picked up on in this speech?
Does 'show' not 'tell also count for non-fiction like a speech or only fiction?
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