Not necessarily but a nonchalant attitude can be viewed as noncaring or detached.
dulled by surfeit exhausted (Example: "The amoral, jaded, bored upper classes")
Someone is considered "jaded" when they think they have seen and done it all, and they act bored and unexcited at whatever is happening around them.
Nonchalant means rude and not proper so if someone would have that attitude it would mean that person wasn't a very polite person.
Nonchalant means not concerned or indifferent.
Jaded
To be nonchalant about something means that someone is very easy going about something and acting as if it is easy or is not really that big of a deal to them.
His view of life is jaded after realizing he was conned by his wife for 30 years. I will never use the word jaded in my life as I am not sure what it means.
Synonyms: apathetic casual complacent disinterested incurious insensible insouciant nonchalant perfunctory unconcerned uncurious uninterested
I believe it means they are not telling the complete truth
A person with a jaded heart believes there is no such thing as love. They will use others for their own pleasure not caring how it may hurt the person.
The man was nonchalant