This is a very pessimistic view of the whole Web. Going by the author's point, we shouldn't even meet people at any place and have a discussion because anything

This is a very pessimistic view of the whole Web. Going by the author's point, we shouldn't even meet people at any place and have a discussion because anything you say will be gone forever. People were collecting knowledge in books since they were invented, then we got web and we started using that as medium to share knowledge. Books have a long lifetime, but even they are not forever. Look how web has contributed, it would never have if we didn't shared relevant stuff on someone else's website. Don't stop sharing relevant stuff on web forums.