One presumes these climbers would (a) be of the age of consent, and (b) be in a dangerous situation where each was counting on the others in line to save their life if necessary, using that rope. Each person in that climb is making life or death decisions.

Here the children have no ability to consent, and the adult is making all the decisions. This teaches lessons that you may not want to teach young children about personal responsibility and looking out for yourself and each other.