'You think people are inherently stupid and end up buying things they will regret.'
No. _history has unequivocally proven_ that people are inherently stupid and end up buying things they will regret. Or at least they should, if they were aware of the full extent of damage typical products cause.
Its about the numbers. Sure sometimes they are stupid and make stupid decisions but the extent matters. Take your own example - if I ~reach~ read your purchase history can I characterise you as inherently stupid?