Humans ARE social animals. Living in a society requires adherence to the social rules. The Noble Eight-fold Path is the sum of such rules.
It's not possible, as long one hasn't left society and impure dependency, to live even the holly life, not to speak of developing the path. And it's nothing but strong craving, tanha, that argues that one has still task for the sake of birth, aging, sickness and death.
And since there are only less who are capable to gain ways for right livelihood, the Sublime Buddha found the Sangha of Bhikkhus, a "para-society", which does not get into trades with those bond in common societies, community of those gone forth.
A human isn't anything but does in accordiance with such existence, and it's a human application to be capaple to chose different ways of living, an animal has not and stays bond in it's society and impure ways, good householder.
Beings are bond though there sensual cravings in the sensual realms, not even seeing it's misery and pain. Even to reach the Brahmas one would be required to leave impure dependency and impur ways.
The Noble, Ariya Eightfold path is "just" that of the Noble Ones, isn't conducted by else, since it has right view as it's base condition.
No way for one not going for the Juwels as his refuge.