It is mostly up up to the owner if they want to mist. A lot of caresheets say that they are suppose to have high humidity and that you should mist a light spray daily.
Personally, I mist because it is hard to keep humidity to about 50% in my tank. My frogs really seem to be more active, eating well, and alert when the humidity is at about 50%.
Misting helps with humdity. If humidity is already good in your tank then it is really up to you if you want to mist or not.
Just my 2 cents.
