OP: Part of the issue here is that your friend has some extracurricular activities:
Tutoring, babysitting, and working as a lifeguard are all respectable extracurriculars, and I doubt any college will scoff at them. Cross-country, like many sports, is viewed favorably. It would obviously be better if she was on the varsity team, but a sport is a sport. Committing a significant amount of time to running is a respectable activities.
Despite all the above, you chose to start the discussion with the following statement:
That probably influenced the course of the discussion. It’s also not the fairest assessment, judging by the above. Are there students with more “impressive” extracurriculars? Yes - there are quite a few among top 20 applicant pools. Does that indicate a total lack of commitment to anything in her life? Not really.
Most people don’t deal in harsh judgments of their friends, and it didn’t contribute to the conversation in this case.
Edit to add: If your friend has been interested in this camp for a while, and wants to do it, she should. In all likelihood it would be a great experience. That’s the only thing that really matters - she’ll get into a good college whatever she does next summer, and >95% of college students love their school. Life is too short to spend it doing something simply because it “looks good” to colleges.