Because it is the human scale for temperature. It turns out to not matter that much. but imagine a cold snowy winter, that's 0 and image a hot summer that's 100.

Really both C and F are silly, the minute temperature was found out to have a zero point, they should have been discarded, and we should have gone full in on Kelvin(or Rankine if that is your jam), or even better a new unit that better integrates 0, a scale from 0 to the boiling point of water? and give water boiling 1000? or would it be better to give water freezing 1000? Triple cells are a common way to calibrate temperature.

It's not. I just want "cold, cool, warm, hot" and that maps nicely to 0C, 10C, 20C, 30C very nicely.

0°F to 100°F spans the full range of temperatures I'd go out in & not consider it "extreme weather", so it's rather intuitive in that you can think of it as "how hot is it on a scale of 0-100". It feels very human centric & convenient for everyday usage IMO.

Most people who like it like that it puts "human temperatures" on a 0-100 scale, with 0 being "freaking cold" and 100 being "too damn hot".