I fully agree with @PatNowak. The usage of @specs goes further than using Dialyzer. I find it very helpful that functions clearly indicate what input/output they receive, especially because Elixir is dynamically typed.
Dialyzer’s main purpuse, in my opinion, is to make sure that the written @specs match the function’s implementations. I completely agree that it is less nice to use than typing in a statically typed language, but even when not using Dialyzer, do not underestimate the @spec.
