Computers and word processors save us the trouble of writing twice, once long hand, once feeding single sheets of paper into a typewriter and wasting many sheets in typos that correction tape can't overcome. Because it is easier to rearrange paragraphs with a word processor, we become more willing to fix what we might have let stand in typewriter days. As for the claim that spell check and grammar check keeps writers from learning, consider the benefits of having our typos underlined in red and our questionable syntax marked in green. If our oral discourse were so marked, we might become a more articulate culture. Marshall McLuhan explains that each new technology extends some capacity of humans.
Meaning arises from an interaction from medium, message, sender, receiver.
New technologies may give us instruments for greater thinking and discoveries that would be impossible without them.