This high minded advice can be a very bad idea, depending upon the nature of the friendless. It could get your child raped, drugged, or killed. They easily pick up bad habits via their empathy. Losers tend to cling like glue, taking up precious study time and inhibiting other relationships. One learns from fine examples as well as losers. Hence a certain amount of this is fine, but such a blanket pronouncement is a hazard, particularly to girls.
Ya got that right.
I used to like people, until I started working with them regularly. Now, not so much anymore.