None of these languages even come close to the level of library support and popularity as Java. Additionally it becomes a people problem when you use a language

None of these languages even come close to the level of library support and popularity as Java. Additionally it becomes a people problem when you use a language people aren't as familiar with leading to people building connectors which don't perform as well as using the original libraries. With Java, you can directly import a lot more, especially since the vast majority of OSS in this ecosystem is written in a JVM language.