Imo the issue is not that this ambiguity prevents growth, but more that it contradicts the principles described here. If you have a community that strives to be different than siloed monocultures, then it's important to make participation in the community easier for outsiders, and to make it's ideas accessible to people from different backgrounds.
I don't understand this idea that everything has to grow. Who cares if it grows or not, as long as the people who use it enjoy it?