SICP - Why use accumulate with cons when filter already passes back a list

Question

In SICP 2nd Edition section 2.2.3, the authors have the following code:

(define (even-fibs n)
  (accumulate cons
              nil
              (filter even?
                      (map fib
                           (enumerate-interval 0 n)))))

My question is why did they use accumulate in this case? Couldn't they have got the same answer from filter without using accumulate?