It's meant in the sense of "underwhelming" (as shown by the follow-up comment the article references). It's not incompatible to be surprised at how capable AI is (ie. being "impressed") and at the same time be also unwilling to pay the costs / repercussions and want to ban / regulate it.

In this context, being deeply unimpressed with something is equivalent to calling that something "irrelevant" / "incapable". If AI was no more impressive than it was before the LLM boom then there wouldn't have been such a reaction against it to begin with. If anything, people being now opposed to modern AI is proof of how impactful AI has become.