Because of how 2.80+ changed the concept of everything, exposing things that were only accesible through shortcuts and hard to find for new users or users coming from other softwares. Now there are menus in a header, tools in a toolbar…
Digital painting softwares also have a shortcut (alt/ctrl) to quick switch for eyedropper but we all know they also expose that tool in the toolbar with the rest of tools. As well as you can also use shift in sculpt to quick smooth surface or select the tool of smooth brush in the toolbar.