and notably, if you actually climb mt everest, you start well above sea level so the total ascension is much less than 8848m. Clearly not a direct comparison
In case anyone wants the numbers, Everest base camp to the peak is 3485 vertical meters. But this is done over multiple days. From camp 4 to the peak is "just" 850 vertical meters, less than 1/10 of the 8848m Everesting climb.