If a lens reveals a truth about reality isn't it true? Also I don't know what artificial distinction you're making between this and a religious belief. That's what all religions do.
"There is a self I can pinpoint" is as valid as "There isn't a self I can pinpoint". "God(s) exist(s)" is as valid as "God(s) doesn't(don't) exist". When I have this problem, I can use a hammer. When I have this other, I need a CNC mill. That's my understanding.