That's where we go; Human beings have free will and generally tend to choose the bad, that is, they make bad decisions. Vices are a clear example of this. Many people get second chances but others don't.
We see how many politicians, artists, soldiers, rulers and others fall into addictions.
The environment that surrounds them, the system that drives them, a weak character, mental trauma, psychosis, etc... added to this a marketing that encourages the use of substances that produce addiction. Everything is on the table for us to go there. It is our decisions, bad decisions that allow us to fall to the bottom.