When you decide to wing it, you’re deciding that your time and comfort are more important than the experience your audience will have.
“Winging it” usually leads to stream-of-consciousness remarks that are unstructured. There may well be moments of brilliance, but they’re hard to find in the rambling river of words.
Take the time to give your remarks some structure. A strong opening, transitions, and closing will make your audience feel taken care of.