To me, Instagram is a public platform at its core, where people publish things for the whole world to see. Private messages are just a secondary feature.
It is like having a conversation in a restaurant, where the guy at the next table can listen to everything, but usually doesn't. Good enough for planning a surprise party, not for truly sensitive information. Kind of like private messages in Reddit, Discord, etc... a convenient feature, but don't expect real privacy.
Messenger has a higher expectation of privacy, Facebook is more at the "group of friends" level. While Instagram is a public restaurant, Facebook is more like a house party. WhatsApp has the highest expectation of privacy as it is designed for private, often one-to-one conversations first.
alt Hacker News
To me, Instagram is a public platform at its core, where people publish things for the whole world to see. Private messages are just a secondary feature. It is like having a conversation in a restaurant, where the guy at the next table can listen to everything, but usually doesn't. Good enough for planning a surprise party, not for truly sensitive information. Kind of like private messages in Reddit, Discord, etc... a convenient feature, but don't expect real privacy.
Messenger has a higher expectation of privacy, Facebook is more at the "group of friends" level. While Instagram is a public restaurant, Facebook is more like a house party. WhatsApp has the highest expectation of privacy as it is designed for private, often one-to-one conversations first.