> If you perceive it, then it’s sense data. So photons and sound waves.
This presumes materialism, which many believers in the supernatural do not grant.
Even in a materialist framing, where the brain is the source of all perception and experience, these things could originate as strictly internal phenomena, not triggered by senses.
It's also conceivable a supernatural being / Simulator could tweak things directly in your brain to communicate, which stays fairly materialist but still allows for non-sense-driven communication.
Are these plausible? Perhaps not. They are conceivable, though.
Your perspective is perfectly valid and rational, but holding yours out as the correct answer won't help you understand perspectives other than yours.
> Not having a good explanation for how you know something does not imply fairies did it.
Since I didn't bring fairies up, I'm not sure what that has to do with anything.
If you have no good explanation for something, that's not great grounds for saying "I'm sure the true explanation lines up with the way I see the world."
And yes, that cuts both ways, and a little more humility would hurt neither side.