I think there is a purpose. We just don't know what it is right now. It's revealed itself to be noticed and to be associated with good interventions. It's planting that idea that Spock and friends need to follow it to save the galaxy. If it remained unseen, it would be hard to do its bidding! I'm guessing that later in the season, the RA makes a big ask, purportedly to save the galaxy, and it'll need to be a be known entity to do that.