It is known that all humans have chakra flowing through them after hagaromo otsutsuki spread his creed of ninshu.
It is shinobi who learned to weaponize chakra after indra created the basic handseals.
Yes kekkei genkai are genetic but it only becomes so after generations of families using what they are that is passed on via DNA.
Meaning the first lava release user taught his children and they after them until their bodies adapted to that specific combinations of nature releases!
Kekkei genkai can also come from sudden spontaneous genetic mutations where a trait never seen can become a dominant trait passable via offspring!
Chakra in its entirety is all encompassing chakra can be used to create things, substitute for things and more.
Having a harem when your clan has so many members is kinda useless!
#1: Without chakra being a stored energy the Uzumakis clans so call large reserves would not be a thing.
Nor would seals engraved on the human body work with out the body having a reserve to pull from.
So yes there is a chakra pool/reserves!!
#2: Yin release is chakra made via the mixing of mental/Spiritual energies plus physical energy where the balance is shifted in a more spiritual heavy mixture.
Yang release is the opposite with a more physical energy mixture.
#3 Chakra is created from extracting the 2 energies above to form chakra there is no food shit or nothing so, anything food wise would if someone who was malnourished wouldn't be able to generate as much chakra as someone who wasn't.
The Uzumaki clan is well off thanks to their sealing prowess so no there is no loss when creating food via wood release.
As the 4th kazekage was known for mining gold sand with his magnet release to bring in income for sunagakure!
#4: the reason I chose wood release as kōgas answer to a possible invasion was because it can cause large scale destruction better than most other kekkei genkai. Especially this is not a "the mc says and it does" he has to practice, experiment and more when it comes to ninjutsu and fuinjutsu!
Another things is that someone people have this hard on for killing konoha, I won't be over villifying people who cannoncally had no part in it.
Yes I could make it so that danzo did his thing having his newly established root whispering here and whispering there but for you who want me to kill people like the 3rd, sakumo, the sannin even if orochimaru is orochimaru then this isn't the fanfic for you, thanks for reading though and enjoy your day!
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Kekkei tota's are a mixture of 3 changes in nature release, for example Iwagakure's famed dust release used by both the 2nd and 3rd tsuchikages.
Kekkei mora are bloodline all encompassing meaning they are a mixture of all 5 standard nature releases along with yin and yang release for example the rinnegan, tensigan and the truth seeking balls.
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Tail beast are chakra creatures created when hagaromo otsutsuki split the chakra extracted from the 10 tails.
The 10 tails is an amalgamation of nature energy this is why the 9 tail beast can siphon nature energy to reform or refill their reserves.
All jinchuriki who have offspring will pass on some sort of trait for example naruto had whisker marks from being exposed to kuramas chakra even before birth and those whiskers were then passed onto Boruto and himawari.
I don't know why tsunade or nawaki did not have any signs from being the decendents of a 9 tails jinchuriki another recon that wasn't touched upon.