I wasn't really arguing that a position player is worth more than a pitcher. Just kind of showing that it doesn't really matter if he only impacts a certain number of games (see the comment I'm replying too).
Also, just because I feel it is worth mentioning in this specific case (Ruschman), someone who scouts say is great behind the plate would have more involvement than just 4 at bats a game. Just an additional 2 cents.