I would figured it the other way round. For me it seems that the mousers are the people that do not really learn what they are working with, and only click by rote. Those that know how to operate by keyboard on the other hand also know the software, as they had to discover the shortcuts somehow.
Also true. The shortcut skilled people were then followed by people how could make their own shortcuts. At the end were those who thought themselves simple macros to automate things.
Now i find myself reminded of an article on OSNews of all placed that i dug up a while back.
https://www.osnews.com/print/6282/The_Command_Line_-_The_Bes...
The mouse skilled people where way more advanced and picking up the taught skills much faster in the practical courses, so I had to tune the program to haptically help the novices and do only non-mouse-favoring questions in the exam. The beginners and the women were equally good in the academic skills, but the women still left from 50% down to 20% for social reasons. But in the end - in the office - the numbers were equal again, even more than 50%, so I was happy.