We don’t have direct access to our OWN experience’s. The flaw is assuming that somehow we do.
The brain is an outcropping of the nervous system It is part of the same nervous system that pain is.
A story told, by whatever means, that engages the listener/reader/watcher/whatever into replacing their “me” with the “me” of the character through suspension of disbelief, and YES, you can feel their pain. Shared subjectivity.