Should I be able to provide a default spec with the `:default` implementation of my multimethod?

default_spec.cljs

;; [org.clojure/clojurescript "1.9.229"]
(s/def :event/type keyword?)
(s/def :search/url string?)
(s/def :error/code int?)
(defmulti event-type :event/type)
(defmethod event-type :event/search [_]
  (s/keys :req [:event/type :search/url]))
(defmethod event-type :event/error [_]
  (s/keys :req [:event/type :error/code]))
(defmethod event-type :default [_] (s/keys))
(s/def :event/event (s/multi-spec event-type :event/type))
(comment
  (s/valid? :event/event {:event/type :event/error :error/code 1}) ; Valid
  ;; event-type does return a spec for unknown types
  (s/form (event-type {:event/type :event/unknown})) ; => (cljs.spec/keys)
  ;; But the unknown event is not valid
  (s/valid? :event/event {:event/type :event/unknown})  ; => false
  (s/explain :event/event {:event/type :event/unknown})  ; val: {:event/type :event/unknown} fails spec: :event/event at: [:event/unknown] predicate: event-type,  no method
  )