Why can't "hopefully" be used in an absolute sense? Such as "hopefully it wont rain tomorrow?"

Question

I understand that when used in that context it means you "HOPE" it will not rain but but how do I better understand and explain that?

please no rude or stupid answer take them elsewhere

Answer 1

hopefully isn't really used in the absolute sense, can it?

However, it still isn't really formal expository mode...

Answer 2

nah

Answer 3

Oh yeah?

i thought it still can be used..

because any prediction of weather like is it rain or not is actually just a forecast.. that has some errors..

so we also can say that the prediction would be 100 % correct.. still there is a chance.. that the weather prediction doesn't suit with the reality..

so.. we only can hope that the prediction will be right..