Question: Why is the "input source"-shortcut fixed?

[notebook]

>> Under Settings -> Region and Language the user can setup several
>> "input sources" (keyboard layouts). The shortcut for switching
>> between them is currently not configurable on the GUI.
>>
>> Is there a specific reason for having the shortcut fixed instead of
>> configurable (in the GUI)?
> 
> If you click the cogwheel there is a reference to the keyboard settings, i.e. "Keyboard Shortcuts". That's the GUI where those shortcuts can be changed.
> 
> (Tweaks offers further options for setting a shortcut for switching input languages.)
> 

Thank you for the information!

  The hint says "These keyboard shortcuts can be changed in the keyboard settings". However, if I search for "keyboard settings" (all applications -> type), Ubuntu does not find anything. I'd say that's a "dead hint"? It should actually say "can be changed under Keyboard shortcuts".
If a non-technical then opens "Keyboard shortcuts" they get a huge list of which 99% is not interesting. If they are unlucky, they don't see the magnifier in the top right and start reading every entry.

  I need to change my question:
- Is there a specific reason, why the shortcut cannot be changed in-place (= at the location, where the setting is shown)?
and / or
- Is there a specific reason, why the help text does not appear as a link and jumps right into the "keyboard shortcuts" with the two options preselected?

Regards
DarkTrick