Listen carefully.
Yes, those are rules that I created.
But I didn't created them for funzies. There is a reason behind each of those rules. The 7 rules are the BASIC things that are necessary for a character to become a strawhat.
Try it yourself. Try to reduce to the minimum the most important rule to create a strawhat and you will see, you will end up with the same result (and if you don't, share your result, I would be glad to add more rules to my list)
The 12 pillars are created on the same principles. The parameters are simple: What needs the story and what needs the character to create a strawhat.
Same, do the work, you will end up with the same principles.