Early Intervention is scary to many parents. In my 24 years of working with addicts and their families I frequently see parents who know their sons or daughters are in trouble with substance and behavioral problems. But it scares many parents to take strong action to get them help.
One barrier to parents taking action is failing to recognize the need for clarity. If a 16 year old or 20 year old is using alcohol regularly or smoking pot regularly many parents will agree it should not be happening but refuse to confront and provide consequences for the behavior. The result is that teens take inaction as permission.
If you don't want to give permission to your child to get drunk regularly, drive while drinking, become addicted to pot or prescription drugs then it is your responsibility to make clear what you want. Otherwise, you have said "go ahead..."
Strong action means you agree with the idea that the earlier a person stops drinking and using drugs for fun, the lower the cost for getting help, the easier persons change and the better the results. If your child is one who is susceptible to addiction and becomes locked into an alcohol or drug habit then the cost for help will soar. With addiction, the time to get better increases and chances of real change are lower.
Early intervention is intelligent action to face a problem and work toward solutions. Why not start now?