sure it matters for those in that mess. I have friends who have kids who have been kicked out of Yeshiva for smoking Cannabis, and for engaging in relations with opposite sex. now these 2 are one is completly otd and the other is just about. You can see them in SHule twice a year.
The reasons are certainly important to help others mainly.
How to get them back to Yiddishkeit is a different topic, you should help others to prevent. Even though each family dynamic is different.