Well to each their own. Some people just like to experiment with different things.. I nkow thats what I always do. Part of the fun is breaking things and then attempting to figure out how to fix it.
If he wants to isntall linux I am sure he is doing somewhat of the same thing.. testing the water a bit.. to see what he can do
Everyone has a good reason.. some people just like to fiddle.. and I know I am that way
ho ho ho