I wouldn't call it disturbing - only, if I want to create clickbait. "Expected" would be more like it. There you go:
“When people rely on large language models to summarize information on a topic for them, they tend to develop shallower knowledge about it compared to learning through a standard Google search,” study co-lead author Shiri Melumad, a professor at the Wharton School of the University of Pennsylvania, wrote in an essay for The Conversation about her work.