That might not be completely fair. In our sister organization, we had a 20 year Java veteran switch his teams to Elixir because he was concerned about Oracle's licensing. Even though it was a misunderstanding, I wouldn't assume "anyone that actually works with Java knows the difference".

Furthermore, it's a little bit of gatekeeping for those who may be entirely new to understand the difference between something like OpenJ9 vs AdoptOpenJdk vs Amazon Corretto.... you get the point.