The Chassidishe Gatesheader: We do know in some cases that X can cause Y. For example, the Mishna Brurah says that talking during chazaras Hashatz causes shuls to be destroyed. We know that doing kibbud av v’em properly leads to long life. Where we have a source for something, there’s nothign wrong with relying on it.
It’s when people make up things (like when people blame things on a lack of tznius these days) that it becomes a problem. But as I wrote above, I believe there is a source that says homosexuality causes nature to go haywire.