The parking brake is not linked to the parking prawl at all. The parking brake should actually be applied before engaging P as it prevents excessive wear.
I said that I found it strange that you advocated not using the parking brake when engaging N so how are you going to prevent the car moving unless you keep your foot on the footbrake which then risks, over time, warping of discs?
Always apply parking brake before shifting to P though.
One of the problems often encountered with cars with auto boxes is that if the parking brake is not used regularly the mechanism can seize up.