You have to draw lines and place the components with a mouse anyway.
Not quiet true. I'll give you an example.
Let's say I have finshed the schematic and I want to start with the pcb layout.
On the monitor on the left there's the schematic and on the monitor on the right there's the (board) layout.
The layout consists of an empty rectangle (the pcb) and aside there are 500 components that needs to be placed.
Let's say I have zoomed into a part of the pcb where I am laying out some components connected to eachother in the schematic.
Let's say I want to take R233 from the heap and place it onto the board area where I'm actually zoomed into.
I just type: "move r233" and that component is imediately attached to the mouse cursor and I can place it immediately without
the need to:
1.) zoom out
2.) pan to the area where all the not yet placed components are
3.) zoom in and try to find R233 between all the others
4.) grab it /select it
5.) zoom out
6.) pan
7.) zoom in
8.) place it
Repeat this for all the other components...
So, using the keyboard, you save a lot of time and you avoid rsi.
And you don't need to repeat typing the whole command again for the next resistor.
Just hit the up-arrow, backspace and enter"4" to grab R234...
In fact, the only time I use my keyboard, is to type messages (on forums ), fill in measures or formulas.
I use the keyboard as much as the mouse when creating schematics or layingout a board.