High or low humidity

Is higher humidity (70%+) in a ball python's enclosure more dangerous than low humidity (40%)? Or is lower humidity more dangerous than high humidity?

I know that both are bad, but does one cause more health issues than the other?

We we freshly change out Valentine's substrate and do an overhaul, the tank always goes up a little higher than I'd like. But it dries out pretty fast so in my opinion I would say better to go high and let it dry than be dry and try to get high. LOL that applies to other aspects of my life as well hahaha ;)

As long as the substrate is dry and they are not in contact with moisture I would rather have it a little high than too low.

If you look at their native areas, you will see that the humidity ranges are often 70% or even higher. I think everywhere I have read about sick snakes, or snakes with issues, they all say to bump up the humidity. That makes me think that higher is better than lower...

Actually Ghana and the native range of BPs sits at about 80% humidity. Keep in mind though that there is a very big difference between humid and wet. Achieving high humidity doesnt mean the BP sitting in a pool of water on the substrate.

40% is no where near dangerously low humidity . They say 50 to 60 but 40 isn't that bad as long as you can bump it a bit for a shed
As for high tho. If you don't have good ventilation high humidity is dangerous and is more likely to cause ri's. I've always been told if you have condensation in the tank you don't have enough ventilation