Isn't that a bit like saying don't make Linux a monopoly? Things are a lot better with an open source "monopoly" than a proprietary one. In fact I'd say an open source monopoly is even preferable.
Not at all. It's saying use standards when there is a standards compliant alternative, because it's both better coding practice and because it means you won't be screwing over your users and you won't be screwing over developers who wish to write alternative implementations.
