I too have looked at that signature and dismissed it as simply wrong.

The saying that the NPS puts up on trail info signs I think expresses it better. "The mountains don't care." And that's nature at it's most benign.

In reality, there are elements (insects, reptiles, arachnids, and mammals) out there that are trying to eat your lunch, or eat YOU for lunch. They are actively seeking your demise or just wanting to abuse you for their survival benefit. It's without malice but it's active.

So you could expand the topic considerably.
The mountains don't care if you aren't having a good time.
The mountains don't care if you think they are beautiful.
The mountains don't care if you die here.
The mountains don't care if you are injured here and die somewhere else.
The mountains don't care if your wife never sees you alive again.
The mountains don't care if you have to cut off your arm to save your life.
The mountains don't care if you fall thru the ice and die of hypothermia.
The mountains don't care if that rattlesnake never gets to consume you as prey. (Some other creatures will though.)


etc.


I suppose you could also find an analogue in daily life.
The other driver doesn't care.
The cop doesn't care.
The guy who designed this highway doesn't care :-)