Think of it more like this. On page A, you have a button. It looks like a button. When you click it, a dialog opens that confirms you want to perform an action

Think of it more like this. On page A, you have a button. It looks like a button. When you click it, a dialog opens that confirms you want to perform an action. On page B, you click on the button, and it's a dropdown. You now have lost a sense of the mental model of the application world. It's possible that you may want one of three actions based on your mental model, but the visual should lead you to know "this is different." If you have something that looks like a