People think Jurinchi are the demons they contain.
They aren't.
This is because the demon they contain is a separate entity, much like conjoined twins are two people.
People think Jurinchi are fated to unhappy childhoods.
They're not.
This is because a Jurinchi could have a happy childhood, if the village it lived in was more accepting, or if no-one knew of the sealing. This rarely happens.
People think Jurinchi are just living weapons.
This is not true.
This is because a weapon needs training and a driving force, no matter the source.
People think Jurinchi all have large chakra sources and insane stamina.
They don't.
This is because they would have had that anyway, and placing a demon inside them only enlarged their chakra pathways, not the reserves themselves. In fact, most Jurinchi who become shinobi are more likely to suffer from chakra exhaustion, because their pathways are too large and efficient for their chakra level.
People think Jurinchi are just humans with demons sealed inside them.
This isn't exactly true.
This is because the sealed demon's chakra slowly seeps into the Jurinchi's own, changing the Jurinchi slightly. This is why the Kyuubi's container will always have six whisker marks on its cheeks; the Ichibi's will always have panda like markings and the others will slightly resemble the demon they contain.