The Java 8 streams library can auto parallelize things. That's the main reason it was created in fact!
One simple reason: you already know streams and don't have time to learn sequence.
Streams is mostly just Java's version of what many languages already had, so the concept was something new to learn for Java developers, but once they know it they shouldn't have much trouble with Kotlin's sequences – or with Python's list comprehensions, Lisp's mapcar, and so on.