> For example, with the advent of no-fault divorce, divorces went up, but female suicide rates dropped by 20%. It wasn't all streamers and light when the 'guard rails' were on.

Did the female rate decrease more in married groups than unmarried groups? Without more data, this seems like a ripe candidate for https://www.tylervigen.com/spurious-correlations

Suicide rates have been dropping across the board due to a variety of reasons. Attribution is very hard here.

https://abcnews.go.com/Health/story?id=2504425&page=1