Mainly in the parts of the game where dropping an item might marginally benefit you like this, such as the early/mid-game, you don't have much to worry about anyway and it's not really worth doing, but later on having an open space on the ground below you can become pretty important for various tactical reasons, not to mention the chance that something could come along and steal whatever you're dropping, or destroy it. It's only one attack, after all, and there are other risks associated with doing it. Can discuss it with the folks on Discord if you want some more input.