Well, you can make a an Event to a Blutility button by checking “Call in Editor”. If you select an instance of that Actor in the scene and scroll down in the details panel on the right, you should find a blutility dropdown menu.
Other than that, no we can not have a button without writing 2 pages. The Engine editor is build around slate and you can’t dodge writing C++/Slate for everything. Blueprints don’t cover everything.