It should matter to you if you read the words of Christ, and take them to heart, since he does refer to Adam as being a real person.
One should not be ashamed of the word of our Lord. Remember his admonishment.
A metaphorical person can be a real person.. or a group of real people.. On the otherhand a metaphorical personality can be more than a real person.. or all three.. A metaphor can transcend language and culture.. for just that reason.. Jesus spoke mostly in metaphorical terms.. not completely but mostly.. I know few christians that are conserned with the meaning of Jesus metaphors.. except as a kind of prose, let alone, his compounded metaphors.. which I term megaphors.. composed of microphors and macrophors..