Dittoes. And think of all the synergistic and serendipitous learning which can come from the simple making of mistakes. Thomas Edison is a perfect example, a man who pushed his way through his mistakes and failures, all the way to a brilliant success. He theorized, experimented, and failed his way through to 1093 patents.
No, expertise needs action/practice to mold its shape. But think of the benefits to all if everyone read more. One truly can read their way to competence.
-- Every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving. -- Albert Einstein