Why are pieces framed without glass?

I have had many pieces without a glass covering hanging in my own home for over 20 years without a problem. All my pieces should be kept out of direct sunlight and humid environments like bathrooms but other than that, once they are on the wall, all they need is a light dusting with a hair dryer or feather duster. The main reason I choose not to frame many of my pieces is because I feel it enhances the enjoyment of the art.

See my emotional commentary about framing below from my Instagram account.