Being able to fy 20 meters is significant if you are attacking or fleeing.
After my parents got rid of the egg layers they got bantams as free roaming pets. They were fearless, especially around cats. They attacked cats using the raptor strategy from Jurassic park. One would slowly advance on a cat while it was eating. Others would advance from the flanks. Within a couple of minutes they had the cat food.
And of course the cat, being a predator, knew when to give up a regular meal rather than chance injury.