Well, from the base camp to the top is an overnight for most people but not that bad.
Uh.... I think you just validated Koy's analogy.
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The average time from arriving at Base Camp to reaching the summit is 40 days.
If you are prepared to try to make it in one day, you probably WILL have eaten two of your best friends and left three others where they froze to death on the way up.
My point is that looking at the distance is the wrong thing entirely--the problem with Everest is the elevation. And your 40 day number isn't about distance. People wait that long because of acclimatization and the weather, it's not that it takes that long.
You're showing the north approach which is longer. Still, however, looking at your map: From the camp at the bottom of your map to the last camp before things go steep is one very long day, or two moderate days. The last camp shown on your map (where nobody is going to stick around any longer than need be as it's in the death zone--you'll need oxygen) is a moderate day's climb from there. From there to the summit and back is one very long day (which can't be broken up) and another day will see you back to the bottom.
Thus your map is showing at most 5 days. The time isn't due to the climb, it's due to the environment.