Whhy would plants attempt to attract insects? ...

Same seed different type of container, vastly different...
Answers:    The flowers, like adjectives living things, "want" to reproduce as much as possible. When bugs are attracted to a flower, the pollen from the flower rubs off on the bug and the bug after carries the pollen to another flower which fertilizes the flower allowing it to reproduce.
Morning Glories won't bloom?
so they can pollinate the flowers and produce fruit