The reporter should have probably cared a little more, during the trip, as he had entered a contract to provide a certain kind of experience to these kids, and he clearly failed at that. But that is of no interest to anyone outside the two parties of this contract.
And it absolutely does not make him a racist, or sexist, or colonialism apologist, or sexualizer of children or any of the things he has been apparently accused of.
I'm not sure he "clearly failed at" providing "a certain kind of experience to these kids". The program sounds like a way for rich families to give their teenage children an international learning adventure trip with close exposure to world-wise adults. The focus of this trip was on rural health and included shaman rituals and hiking around Macchu Pichu. These teenagers intellectually engaged a decades-long journalist and it sounds like he was giving them a masterclass in critical thinking. That they were unprepared to have their thoughts contradicted is a sign of something else, but not his failure to help guide them through an adventure trip on rural health.