Convertible tights, what’s the point?

Convertible tights (or transition tights) can be worn as footed or footless. They have a small hole woven into the sole of the tights (under the foot) so they can be worn footed or converted to a footless tight by pulling the hole over the toes and heel.
Why? This can be used to quickly adjust to pointe shoe pads or to quickly change into another pair of shoes, or to wear lyrical shoes where tights are not needed.