The number of OTD young adults (late teens, early 20s) who go OTD because they don’t believe is on the rise. You no longer have to be from a dysfunctional family, on drugs or anything like that.
At a certain point, you can’t prove Torah. There is emunah involved.
If you don’t believe me, just do a search about the “Orthoprax” movement (Orthodox in practice, not in philosophy). Its growing in all branches of Judaism.
For some reason, Orthodox Judaism likes to perpetuate this stereotype that to go OTD you must be crazy or on drugs.