Non-AI writers, including professionals, imitate other writers' styles all the time, whether that's specific writers or a general genre. For example, the Dresde

Non-AI writers, including professionals, imitate other writers' styles all the time, whether that's specific writers or a general genre. For example, the Dresden Files series started out as an intentional homage/parody of potboiled detective works except with all the urban magic stuff added in, and retained much of that style over time, like the intentionally overdramatic internal narration.