Absolutely. Think about it. If you have a bad night of sleep, typically the next day your mood may be altered; you may be a little bit more irritable, and not as pleasant as usual. That's after one night. If you multiply that by thousands of nights of many years of service, you are going to have some impairments or difficulties in facing the world, in getting out of the basement.
The other truth is that when we have chronic sleep problems, it's just hard to handle things that are coming at us, so instead of exploding or having an argument with somebody outside in the street, people will oftentimes choose to stay in their basement. They use it as one of their avoidance strategies, to avoid arguments, avoid being hyperreactive.
Yes, if we start with sleep, not only can we improve sleep, but we can make people feel better, and make them feel that they are better prepared to handle what's coming up on a regular day-to-day basis.