Because the old guys did some messed up shit in the past. Also they barely care for the future and are disconnected from the young.
Bernie has consistently stood on the side of civil rights and good over the course of his life. If I perceive him correctly he also still interacts favorably with young political movements ans opinions.
If you fail to provide uncertainty it suggest that Celsius is much more complicated because you need to pay attention to decimal points.
If you write 200 it would be anything between ±50and ±1 if you say 212 it means ± 2/1