I use it all the time to cut, paste, copy, find and replace selection, indent or dedent specific lines. I can get by just fine using for example vim, but I am much faster with a mouse based interface since mouse based selection is much faster and more flexible. Sure keyboards have some shortcuts for specific kinds of selections, but with a mouse I can select exactly what I want in a fraction of a second.

The only real advantage to a keyboard only interface is the ability to automate steps, but I feel if you feel a need to automate your code writing then it would be better to refactor the code to require less boilerplate.