Ignorance and projection is just like seeing an apple - whenever
we see an apple we think the "seed" is "located inside the apple".
Actually that is just a form of self-view (self-view is of two
"levels": the view of subjective self, and the view of self in
dharmas/reifing objective phenomena). In reality we are
manifesting/actualizing different moments of apple by peeling away
the skin, eating its flesh and finding the seed. Each stage is a
clear-cut dharma position or manifestation as Dogen puts it. The
seed is also a coreless, empty, dependently originated appearance
rather than a truly existing thing hiding there. So it is not the
case that there is an 'apple' and a 'seed hiding inside apple' -
the seed is simply a particular instance of apple totally exerted
from all causes and conditions, clear cut from other instances. "An
apple and a seed inside apple" is simply a projection blinding us
from suchness, and the nature of false projections is such that
they persist stubbornly like a spell or a dream until they are
exposed in a moment of clear insight. The bondage that is illusory
nevertheless has an amazing power in shaping our perception and
experience - it defines how we live, how we feel, how we
experience, how we suffer.
Likewise due to ignorance, due to self-view, we are referencing or
extrapolating moments of experience with an underlying substance,
agent, perceiver, etc - like seeing the appearance of apple and
linking it with the idea "the seed is inside the apple". It is
precisely this idea at the back of our minds - of some substantial
core, inherent existence, ground, etc that prevents us from
experiencing the wholeness and completeness of an instantaneous,
transient, flickering and self-luminous moment, the groundless
ground of being/becoming. It sets up a something or someone to be
grasped or sought, resulting in seeking, grasping, effort, deluded
attempts to re-confirm a remainder, etc. It has its fundamental
cause in that "idea back in the head", the view of a real
existence, i.e. ignorance. That view of inherency is the cause of
fabricating duality (dualistic view is a subset of inherent view),
the abstracting of luminosity from an arising, and all the
confusions from without beginning in samsara.
p.s. even after insight, it is not necessarily the case that the
bondage is immediately gone completely, though certain damage is
done.