Hmmm... I never really looked into this concept very closely until now and found this:
"Sekai-kan" is basically the basic view/understanding upheld by a person, ethnic group, civilization, etc., on how the world is structured, how things are related and how they interact. the word "sekai" is used in
Kabuki and Ningyo-joururi to describe the framework created by a preceding work on which the play is performed.
However, it is presently being used to describe the background and setting for dramatic and literary works. The use of the word in this way is actually wrong but is being accepted by a growing number of persons. See this poll:
「世界観」という言葉は「世界についての見方・考え方」という意… - 人力検索はてな
Very interesting, isn't it? As for myself, I have noticed this "wrong" usage but accepted it as one of the words that acquired a new definition over time.
I'll try giving both examples:
Correct usage: 9・11は、アメリカ人の世界観を変える出来事だった。
"Wrong" usage: この本は、中世ヨーロッパの美しい世界観がある作品です。
Errr... not very good...
Okay, another Japanese web page that discusses "sekai-kan" for your reference.
Just my two yen...
BTW, I have noticed quite a few writer who use "sekai-kan" seemingly without hesitation to mean "jinsei-kan".