The Tulkun and Eywa's Three Rules

I've been turning it over in my mind, and I really think like we are not seeing the full picture about Pandora and I think the Tulkun are actually the key to understanding Pandora.

First, of the two sentient species on Pandora (the Tulkun and the Na'vi), I would guess the Tulkun are the older of the two species. Given Captain Scoresby's comments about the Tulkun (mostly that they never stop growing and that at least one matriarch is over 100m long), we can assume that the Tulkun can live extremely long lives, and that 100m is the result of an ancient lifespan. There are species on Earth that have indeterminate growth, and they normally reach their size of maturity quickly (and then grow larger more slowly than they reached their adult size). So, if we assume they grow about a 1/2 cm year and that young adult Tulkun are about 30m long, you are looking at the matriarch being 100m long, you are talking about the matriarchs being (at a minimum) almost 15000 years old, if not older.

Second, we don't know the water-to-land ratio on Pandora, but we do know there are water versions of the Tree of Souls. This implies that the Tulkun have been interfacing with Eywa far longer than the Na'vi have, and perhaps they were the first sentient species on Pandora. Thus, while we see the Na'vi in their afterlife, there might actually be more Tulkun there.

Why does that matter? The oldest Tulkun are the ones with the piercings - they have the giant nose rings and the eye piercings. I can't think of any younger Tulkun who had those piercings - tattoos yes, piercings, no (as far as I can remember, though I have certainly capable of missing details). ?

How does this relate back to Avatar as we see it? The first songs of the Na'vi were roughly 16000 BCE, meaning that the three laws imparted to the Na'vi might have been designed to protect Pandora's first sentient species. Eywa gave the laws to protect the Tulkun. Further, what if the piercings of the Tulkun aren't decorative, but were something more akin to horse bits. What if those piercings are not from the Na'vi, but rather they were forced on the Tulkun by something else, such as an offworld invading species.

All just head canon, but it might be relevant going forward.