I think it depends a little whether a parent should involve themselves in a child's decision.
If the child is clearly making a bad decision then I think it is a parents obligation to try to influence that decision in a positive way.

Hmmm... This sounds like a personal experience... So, did you talking this as a parent, or as a child with a bad decision? 🤣

Bad, I do agree that it can be the case... and sometimes it happens with an adults also... But, in the end, you can's stop the unstoppable...