Why do framework authors not respect the keyboard focus and standard keybindings? Do you find them unnecessary/unneeded? For example, the table view doesn't su

Why do framework authors not respect the keyboard focus and standard keybindings? Do you find them unnecessary/unneeded? For example, the table view doesn't support browsing through pagedown/pageup/home/end, although it supports moving by cursors. Clicking a button with the mouse, and trying to re-click with the keyboard (enter, space) it also doesn't work -- mouse click doesn't move the keyboard focus from the previous widget. Do you target only mouse/touch users with this framework?