You are presupposing that people are going to be omniscient. Without knowing the downsides of the thing they are buying that is cheaper, there will never be demand for something more expensive that doesn't have them. My argument is that if we put on the box what the thing does, many fewer people would buy it, and there would be demand for something that doesn't have those 'features'. It is easy to justify after the fact which is why they just do it and when it becomes common enough people stop caring because they already invest money into it.

'The market is the solution' is true only as long as human factors are seen as market distortions and mitigated through regulation.