Basing a unit of measure on a purely subjective and variable thing like “it feels hot/cold” is a terrible idea. The metric system specifically tries to avoid that.
Plus, whether it feels hot/cold is going to be equally easy in metric and imperial, since nobody’s personal preference falls in the same place. At least with metric, there’s an additional point of reference for worrying about ice.
The water argument gets brought up all the time because it’s the only argument present on on either side.
After that, you are simply arguing about which number you would rather see, which is a pointless argument to have. You like 0 to 100, I like negative numbers, so I would rather use -18 to 38. Arguing one or the other is like arguing if grey or beige is the “better” colour.