They understand the text, but they are unlikely to get the purpose of your writing.
There are no rules on how to formulate an attention grabber.
Considering a semi-scientific nature of research papers, it is not recommended to use an anecdote, dramatic scene, or a metaphor as a hook for the piece. It is more effective to employ a relevant fact, a piece of statistics, or a question as an attention-grabbing element for a research paper you write to leave a reader interested in reading an essay.
To write a good hook in an essay requires particular skills, but practicing will help you find the best solution for certain cases. Norcia, Puzzling Empire: Early Puzzles and Dissected Maps as Imperial Heuristics) This beginning is a good example of how a fact can be used in an intro.
Readers tend to pay attention to those works which provide them with new information.