Do you wish to help the JoS so you can be a HP or do you wish to be a HP by helping the JoS?
This is my personal opinion. But HPs are on a grade of purity and positivity that is only reached by having the best intentions for the JoS first.
One should not help only because they want to attain a high rank, but because their soul is genuine and aware of thousand other souls.
I believe that the HP rank is the ultimate form of evidence that one is sincere about their love for the JoS, proved by their honest purity of character and soul.