objectively, it takes less time to ask a question and get a direct answer than it does to search for some words, leaf through a couple of results, find one that has the information you want, and then read that page. If I want to know the height of the Eiffel tower, being told it's 1083 meters tall is faster than searching for its website, finding the stats section, then locating that information on the page. Google realizes that, so they pull that info out of the page and just put it on the results page for you.