If this relationship button was included on the homepage, and included in the tutorial. Then I might agree that it will give new comers the idea this game is used for dating, but it's not on the homepage, and I have no idea if they plan on readjusting the tutorial for it.
But the sole purpose of this game has, and always will be to GROW. If newbies don't see or realize that, then they have to be blind because it's made clear as day that this game is meant for growing...