Why is there a delete button in the update section?

What is the reason for introducing a delete slide option in the update available section in the iOS App Store, Apple? Not only is it confusing, as it’s unclear wheter I can delete the available update or delete the whole app¹, but it’s also inconsistent in its implementation: should I wait until an app get’s an update until I can uninstall it? Why would you even think about putting the slide option there? It just reminds me of all the other list item slide options out there that were never discovered by any user.