Yes, I know humidity is used to help snakes shed well and easily, but why exactly do we need keep the cage humid continuously? My ball python had never had a problem with shedding for the amount I've had him since he was about a month old (he is now a year and close to 2 months).
His enclosure's humidity level is always about 45% to 50%, but of course when every time I realize he is in the phase of preparing to shed, I always raise it.

I always read that we should keep the humidity levels around 50%, but why do we need to do this when they are not in the phase of shedding? I've tried my best to search each site and forum for this answer, but never found one. This is just a curious question that has been picking at me for a while. Thank you!