Structured data can put information on the results page. Zero-click behaviour is driven by Google’s result formats and by the query. It is not a reliable advantage. It can mean fewer clicks.
What are the two effects?
More space and more elements can be useful when the user still needs the page. The same elements can answer the query on the results page.
What is this based on?
Google does not document structured data as a tool for winning zero-click demand, and it does not document it as protection against it. Result formats and the query decide most of the behaviour.
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