Not arguing with the majority of what you said, but speed limit is maximum safe speed in perfect conditions. (At least here in the usa).
You are both expected and required to go slower depending on conditions.
Reduced sight lines means imperfect conditions and as such you are supposed to slow down.
This is pretty much me my whole life. I sweat super easy.
Also my brain itself doesn't like heat. If you are familiar with Discworld, I'm basically a troll. The heat makes me dumb and unable to focus.
Im also super sensitive to humidity with breathing. When its warm and humid out I feel like I can't breath.