There's a world of difference between having lessor skills or ability and offloading it all to a machine so you don't have to be bothered. Namely, effort.
Its not the fact that people can't write well that bothers me, it's that people don't care to even try to write passably almost at all anymore that bothers me. We're going backwards, not forwards. This is not some niche skill, the ability to communicate concisely. This is a fundamental part of being a social animal. And people are leaning more and more on machines to do it for them.
At what point does the language start influencing the thought?