I take it, you have a really long / full dock, or you prefer to go to the Applications folder / Spotlight.
Some dislike clutter, and pinching with three fingers on the trackpad to access apps is faster than going to a folder or Spotlight. Personally, my Launchpad is organized. Things unused are in folders (which can be created by dragging a Launchpad icon on top of another, akin to iOS). If I don't use the app almost daily, there's no reason for occupy a space in the dock (so I only keep 11 items in my dock, and it auto-hides, providing focus ... for that matter, I only have one item on my desktop, my current project folder, that's it ... at most two (if my NAS drive is mounted)).