Don't disagree with you but two things:
1. Clojure doesn't have as good interop as Kotlin.
2. For some heavy interop projects, it's simpler to write the thing Java.
What good interop does Kotlin have better than Clojure in what concerns calling Java code?
And on the other direction is just as fun, try to call Kotlin co-routines from Java without having to write wrappers for it, or Kotlin code without putting @Jvm... annotations everywhere.
I usually avoid languages that keep reinventing the wheel of established libraries on the platform, "'cause it isn't idiomatic".