We’ve invested a lot of money and time into our tango. To maintain our level of dancing, it’s true that we should spend a lot of time dancing with those who are at a similar level; they’re the ones most likely to both challenge and keep up with us.
With this idea in mind, it’s perfectly reasonable to be selective about our partners.
But spending too much time encouraging beginners can take time away from our own development. As advanced dancers, we should be neither too self-interested nor too altruistic. No one benefits from either extreme. So focus more on being good, instead of being too nice.