As others have pointed out, your specific example is usually covered by the legal system and a strawman in this case - Epstein's friends were middle-aged or old men (Minsky himself was in his seventies when he visited the island), so it's a totally different situation.

The concept of statutory rape recognises the difference between informed and uninformed consent. Children can be coerced or persuaded to consent to things they don't understand, and that are not in their best interests; that's why such laws exist.