Anti-Party Assembly for Seniors Worth it?

The other day before Homecoming at my high school we had an assembly that the seniors and sophomores were required to go to. This assembly was about not going to parties with drinking and drugs, not driving with people under the influence, and not doing drugs and drinking in general. So is the assembly worth having for seniors?
In my opinion no. As seniors we have gone through about 4 years of health and countless assemblies about drugs and alcohol and not doing it. Just because they bring in a new person won’t change the senior’s minds that are still drinking and doing drugs after all the classes and assemblies. They have heard the same thing come from every person that has come to visit and in every class we have taken. Yet, they still choose to drink and do drugs. What makes the school think that will change? Especially as seniors. It would make more sense to make the freshman go to the assembly and possibly still the sophomores but not seniors. The school has shown and taught us about all they can about illegal drugs and drinking and their effects on us. If that doesn’t go through to everyone I don’t know what will. But, I guarantee making them sit through yet another assembly will not make them stop. Seniors should not have to go to the assemblies like that. But, I believe they should make the freshman and sophomores go. They haven’t gone through it all yet and haven’t learned all the school has to teach them. The earlier they learn it the better, and more likely they won’t make the bad decision in the first place.