Not so. Restoring lost or mangled text to great works of literature is an endeavor scholars and educated readers highly value, and publishing houses with impeccable reputations for scholarly integrity have published posthumously edited works by such authors as Melville, Thoreau, Faulkner, Hemingway, Orwell, Joyce, Robert Frost, Mark Twain, and James Fenimore Cooper.
For an authentic look at high-quality scholarly publishing, please see the website of The Library of America.
By the way: Recent years have seen a new edition of J.R.R. Tolkein’s classic The Lord of the Rings, carefully revised in consultation with the author’s son. (Among other reasons: Tolkein’s typists made with the languages of Middle Earth the same sort of errors Śrīla Prabhupāda’s typists made with Sanskrit.)