Huseng wrote: My point has always been in this discussion that teachers are not a prerequisite for liberation. That means you can become liberated and free from suffering with or without a master. Some people are best disciplined by a superior, perhaps, but I won't say it is a prerequisite for liberation to occur.
It is, of course, theoretically
possible, although very rare
that a person can attain perfect liberation from the causes of suffering
in one lifetime, without a teacher.
Your argument (referring to your original post)
is that some kind of "dharma transmission" isn't required for liberation/realization,
and that the established idea that it is
required needs to be challenged.
It may not be a prerequisite
but that still doesn't mean that "dharma transmission" as variously defined, isn't valid,
or as you say, just a myth.
As far as what qualifies as "prerequisite", "teacher" and so forth
perhaps anything that occurs prior to realization can be included
in an interdependently-arising world.
I don't think you can find many examples of people who are self-realized without some kind of teacher.
So, even though it may not be entirely impossible,
it is a moot point, meaning for all purposes, not applicable to anyone's situation.
For example, in vajrayana it is taught that
your enemies, and those who cause you anguish in some way
are often your best teachers, because they test your patience, compassion, generosity, etc.
It is rare that any of these qualities develops on their own, untested, unpracticed.
A good teacher teaches a student how to regard everything as a teacher.