Why save people from themselves, if the do this naively? If anyone does use this service (as a courier) and if they do so without asking these obvious question

Why save people from themselves, if the do this naively? If anyone does use this service (as a courier) and if they do so without asking these obvious questions and then get burned - why protect them? People are (imho) obliged to think for themselves. If they fail to do so why have sympathy?