Ugh, I'm one of those people who will defend imperial as not being irrational, just built ad-hoc for purposes that aren't in alignment with modern ones and ... No, that's not what Fahrenheit is.

Fahrenheit was trying to make a temperature scale that was easy to recreate to ease the calibration of thermometers. Zero is a temperature that can be created in your garage with some ice, salt and water. 100 was his best, ultimately inaccurate, attempt to measure human body temperature, since it's another easy calibration point, and from there water was defined as 32 and 212 so that they were 180 degrees apart, which would fit will on a temperature dial.
Not irrational, not a comfort scale, and not in alignment with current needs.

It's pure coincidence that it kinda lines up with comfortable outdoor temperatures in the opinion of a good chunk of a population living in the northern part of the western hemisphere.

100% hot by what understanding? If I set my oven to 100F, the peak of heat by this memes reckoning, that roast chicken is going to kill my family.

If I run a warm bath at 50F, the medium-est of heats, My testicles are going to implode faster than a billionaire in a homemade submarine when they touch the water.

If we are talking human comfort, then 50F is also way too cold to be considered “50% hot”.

The only temperature system that isn't arbitrary would tell you how spreadable butter is. Zero degrees butter is utterly not spreadable while 100 degrees butter is the maximum spreadability it could achieve before melting.

I use a binary thermometer. 1 is hot, 0 is cold.

This is actually true

Every day I learn that people are even dumber than I previously thought.

I'm 98.6° Greg. Am I hot?