We will assume that room temperature is 20° C. The heat of enthalpy is 2257 kJ/kg, or 2.257 kJ/g. As stated previously, the amount of energy to raise water 1 degree is 1 cal, which also equals 4.184 J. So,
(100-20) × 4.184 + 2257 =
80 × 4.184 + 2257 =
334.72 + 2257 =
2592 J rounded to the nearest whole number. This will leave you with a dry pot.
Now show me the process using Fahrenheit, fluid ounces, and foot-pounds.
So your argument is we don’t need this in everyday life. Sure, that’s sort of true, but I guarantee this was necessary in making a stove that would work in your area. But also true is that if it doesn’t matter that much in day-to-day life, then the only reason to keep such a clunky system is familiarity.
Also, 1 BTU is the amount of energy to raise the temperature of 1 pound of water 1 degree F. So your calculations are already off by a factor of 128. Given the world doesn’t need you to know the numbers for water to boil, that doesn’t affect much, but perhaps the vastly higher number for heating the water versus the amount of energy to get the water to vaporize should have clued you in that something was weird. It’s easy to tell in metric because most of the dimensional conversion values are 1 or factors of 10.
There are people who like to dismiss the value of knowledge because it isn’t important in their daily lives. This is only true if you live in a hut where the only sources of force are human, animal, or fire, or there is someone unseen that you rely on who has used those tools extensively to provide you a life where knowing that isnt necessary. Raising the bar with ridiculous conversion calculations every step of the way makes understanding these concepts more difficult for the layperson and makes the field harder to enter.