~/.local/share/ is not in $XDG_DATA_DIRS, however .desktop files under the applications folder is shown in GNOME launcher

I'm using GNOME under Arch Linux. According to [freedesktop Menu Specification](https://specifications.freedesktop.org/menu-spec/menu-spec-1.0.html#paths) , .desktop files are under $XDG_DATA_DIRS/applications/. But when I was cleaning desktop entries today, I noticed that there's no /home//.local/share/ in $XDG_DATA_DIRS, but .desktop files under ~/.local/share/applications/ are shown in GNOME Launcher. Am I missing something important?