I think the suppressed premise here is “All human beings at all times attempt to conform reality to their beliefs, rather than their beliefs to reality.”
If so, it is a self-defeating position.
He cannot exempt himself from his own universal principle.
So what? I AM doing that? Saying “sometimes some people do this” means nothing.
You can’t magical win debates by simply uttering the magic words “You are attempting to conform reality to your beliefs.”
I can reply with “No, I’m not.”