There might be a better term than 'blind' for this. It seems like the content itself, and the users using it, are the things that are blinded. To be blind is to be disabled -- and Instagram and other corporate services are far from that.

These corporate platforms are like walled gardens, or cult leaders, creating propaganda and structures that blind and bind behind closed doors. They are the oppressor, the users the oppressed. And all at the demise of the health of the Internet. By blocking external hyperlinks, they are actually committing a crime against the rest of the Internet, cutting off the very thing that makes the Internet powerful. Let's start calling it what it truly is, an externality, a cost on people who did not choose incur that cost.