I agree because people like him want to take code from others and since it
isn't copyleft, it is the best option to make non-free or never contribute
back.
They only want to release code that is safe to release and hope that the
community will work on it for them (beats paying a full time developer) so
they can turn around and lock it down.
I still believe that for libraries, its ok to use a permissive license for
easy integration, but complete software packages can benefit from copyleft
licenses the most.
