Everyone who likes symmetry raise both hands.
OK these are extreme examples of symmetry. You can have balance in an image without such an obvious left right mirroring, which is commonly called formal balance.
It’s easy to recognize when there is imbalance
But sometimes can be more difficult to recognize when things are in balance even though we may intuitively recognize it.
In this image notice how the kite and the person are in different quadrants of the image and provide an up/down, left/right balance that makes the image more harmonious.
Here is another image where there is a left right balance without being completely symmetrical
Using symmetry and balance can create images that are harmonious and visually quiet. Understanding it’s effect helps also when you want to break from it and create some discord.