Interesting use case, but not practical enough. All the times when you need to show a loading indicator do not occur after clicking on a button, loading indicat

Interesting use case, but not practical enough. All the times when you need to show a loading indicator do not occur after clicking on a button, loading indicator needs to come up when any amount of delay is anticipated. It can show up after clicking a link, image etc etc whereas this example implies as if loading indicator is only need when a button is clicked.