I think if she’s interested in the camp she should do it. If she were just doing it “to look good” or make up for “lack of ec’s” then no. But it sounds like it’s something she’s interested in and in line with who she is (someone who likes to help people). As for the commitment aspect. Even though it’s several ec’s and not one for a length of time I think her ec’s show a consistent passion for helping others and this camp would be a continuation of that.
Not everyone has “amazing” EC’s. I wouldn’t say my kids had amazing EC’s (no major awards, incredible internships or research) and they are at excellent schools. They did what they loved and their passion and personality showed through those activities as well as their essays and interviews.
As for the feedback you’ve received I think you might have saved yourself some heartache had you started with this :
instead of