The employer or recruiter has your resume, but still expects you to fill out a long job application, or visa versa. They have your job application, but also want a Resume or CV. Seems like its like they are checking off boxes even if the request is a waste of time for you and them. Sort of like a teacher who sends home, home work for the sake of home work. Even if its not related to the work done in class.
Sorry to say but that is nearly EVERY job in today's market. It also helps them in the organization process as well as knowing which role you are applying for and any additional information not currently present on your resume. Yes it may be one more step but that also may be one more step towards landing a job! Mike Grauer Jr