We're in a "both are true" situation here.

AI has real benefits, that are game-changing in some areas, even if AI never improve from their current capabilities.

People are claiming (whether they truly believe it or not) that AI has incredible capabilities and benefits that they don't currently have, and may never have.

There's plenty of scamming going on. The fact that AI has real game-changing capabilities just makes the scams harder to detect. People tend to like to see things as more black-and-white than they actually are, and scammers take advantage of that.