Is there a reason not to expose the intercalate method directly on the Semigroup object?

object Semigroup {
  @inline def intercalate[A](sep: A)(implicit ev: Semigroup[A]): Semigroup[A] =
    ev.intercalate(sep)
}

It provides some type inference convenience in that we can now write Semigroup.intercalate(";"), for example, instead of Semigroup[String].intercalate(";").

Am I missing something or is it just an oversight?