There is our direct Experience,
And the venerable traditions,
All is as God wills it.
Speaking only for myself…
There seems no doubt, to me, that teachers pour their unique propensities, proclivities, and preferences into the stew of their teachings. And these, in turn, are taken by students as expressions of “enlightenment”, as “Truth”.
And the longer and more venerable the tradition, lineage, or religion, the more detritus – concept, theory, and conjecture – accrues into the “scriptures” and teachings.