As others have mentioned, it might be in the interest of browser vendors to get you to perform more web searches.
I don't know what browser you use, but personally I feel Firefox at least does a slightly better job than the competition at highlighting your bookmarks when you start typing in the search bar. Not sure if that is objectively true of course.
On that note, I noticed recently that Google search result links (on Firefox?) get rewritten. That is, you see the actual page URL when you hover over the link, but it's changed to their own redirect URL as soon as you click it.
I'm sure they've always been tracking these search result clicks, but I think this is a somewhat new behavior, and I find it highly deceiving.
https://www.serenityos.org/