WordPress powers 22% of the web (or more - as much as 23.1% when I actually delivered this talk). However, as professionals in the WordPress community, we have to be wary of spending too much time talking to each other, and not enough time engaging with other communities.
What are the people who don't use WordPress doing? Static site generation, lightweight hosted platforms, other open source platforms, proprietary software - there are thousands if not hundreds of thousands of other ways to solve the problems WordPress tries to solve.
If we don't avail ourselves of the conversations happening outside the WordPress fishbowl, we'll miss out on opportunities for true collaboration and innovation.