What result do you expect for something as vague as "flowers"? Try something like "flower delivery <your city>" or "hydrangea" to see a useful search result page.
(Note that while DDG's results page for 'flowers' is cleaner, the actual results are similarly shit.)
While you might want the wiki page for flower when you search "flowers" I think most people might actually want to order flowers.
If I wanted to buy flowers I'd search "florist" or "online florist". The wiki page for florists is surely of far less interest than the page for flowers.
I suspect the google/ddg results for "flowers" are a result of florists SEO'ing out the ass, not a reflection on what people are actually looking for when they search for things.
The Google result page for "flowers" also includes the wikipedia page for "Flower", btw.
Yeah, but it is farther down the list. I have to search for it.
If they wanted the wikipedia page, they would have performed the search directly on wikipedia.
The question you have to ask is: what is the most likely thing they are looking to do? Is it to learn more about flowers (wikipedia) or is it to buy flowers (regular results with ads + map of nearby flower sellers)?
Why not? Computers are better at memorizing things than people; it shouldn't be a human's job to remember a site URL (and browser bookmarks are less useful than intelligent search engines).