>99% of the books in any bookstore aren't worth the paper they're printed on doesn't make reading worthless.
That seems a pretty extreme claim especially in the context of "in a bookstore." You may not be interested in a lot of the content but some publisher thought it worthwhile to edit and publish a given book and a bookstore thought it worth buying copies to take up shelf space. There may be a lot of mediocre content out there but a book on a bookshelf did pass hurdles to get there even if it's not to your taste or interest.
That seems a pretty extreme claim especially in the context of "in a bookstore." You may not be interested in a lot of the content but some publisher thought it worthwhile to edit and publish a given book and a bookstore thought it worth buying copies to take up shelf space. There may be a lot of mediocre content out there but a book on a bookshelf did pass hurdles to get there even if it's not to your taste or interest.