inconsequential
This, like other heist movies, is inconsequentially entertaining.
Unless a book or movie has a sequel, we assume the charaters live happily and inconsequentially ever after.
He doesn’t spend his time reflecting inconsequentially on life's little failures.

SMART Vocabulary: related words and phrases

Of little or less importance
be in/under someone's shadowidiom
be neither here nor thereidiom
big deal
biggie
derisory
meaningless
meaninglessly
meaninglessness
mere
merely
picture
piddling
piddly
piffling
play second fiddleidiom
unserious
unseriousness
venial
vestigial
vestigially