No, they aren't. They are extracting a quote from a source that seems directly related to what you search for. The only difference between this and a regular search result is that it comes in a grey box, and the text is extracted via deep learning rather than pulling the first sentence or some html metatags.
Interpreting a grey box as "truth" is entirely on you.
The problem is that it uses largely the same treatment as it does for actual facts.
In other words, I don't think there's anything wrong with trusting Google when you search for "25 divided by 5", "33rd president of the US", etc. But when Google extends that response structure to things that, on further research, are not established fact, it shares some blame in spreading false knowledge.
Thats a stretch and you know it. Your comment shares some blame in spreading false knowledge yet you don't see me clamoring for HN to moderate their comments for truthfulness.
And no its not different, maybe I am not Internet savvy and believe the top rated comment on HN as the most informed opinion and take it as fact instead of researching something for myself.
To be clear, just because Google has some helpful widgets and search helpers built in does not mean it asserts its search results as facts or even the best result. Google is trying to get you the best answers it can, and makes no claim otherwise.
edit: I stand corrected, I had no idea about the Google TOS here that admits they are committed to only returning search results that are factual, and to that end factual to you specifically: https://google.com/things-that-are-not-there/
Interpreting a grey box as "truth" is entirely on you.