Some people take psychedelics for the feeling of connectivity, and there is some talk out there about psychedelics being healthy for the brain and "helping the brain form new connections" (all of that is based on very limited evidence and a lot of woo), but even that isn't what the article was about.

The article just scanned people's brains while they were on drugs and saw that the electrical activity was more erratic and scattered than normal, not more active and connected, and concluded that people were using psychedelics based on a myth.