>>310091851
ignorance is bliss is not coined for no reason and "stupid" people are happier than smart people by a long shot and that's why people who are down syndrome tier "stupid" are called blessed because they don't see the evil in world etc
happiness and unhappiness just stems from unfulfilled desires and expectations of life, in modern day we are shown lives of celebrities and big shots living it large and we feel we aren't living up to the best life possible 
back in the day most peasants didn't even know how aristocracy lived apart from seeing they wore clean clothes, perfumes and rode fancy carriages, the difference between the two was so vast and mostly separated by birth that peasants didn't even dream of achieving that
now days everyone "can" be rich but the roads to get there are either near impossible, require luck or require you to dedicate your entire life to it and still are not guaranteed
but like you said, no thoughts no worries i don't know if i envy "stupid" people but i kind of wish i could be as happy as them
https://youtu.be/8L64BcCRDAE