What is behind leaf damage that is supposedly attributed to too low humidity? And what level of humidity do Marantaceae really need?

Marantaceae are often sold as suitable for semi-shaded and shaded locations. But what does that really mean for the plants? And what is actually the ideal location? What is the natural habitat of Marantaceae? Marantaceae grow in the shady undergrowth of rainforests , i.e., densely vegetated and far below the giant trees, which can easily reach heights of around 50 meters. But has anyone ever asked themselves how comparable the lighting conditions of natural space are to the d

Where do Marantaceae actually originate from? And what makes this plant family so special?