The point about Lin-Chi getting to call it a staff because he is
setting the context is good: he opens the exchange by setting the
context that presents the most difficulty for someone who has not
attained nirvana yet. But his setting the context does not mean he
buys into it -- in the same way that a coach might do something in a
certain way without thinking that is the best way to do things (maybe
doing things in less-than-the-best way is what best allows the student
to have an insight).