I agree with you. All of those things can lead to harder substances. I never said they don't; in fact, I already said that they could be considered a gateway drug. With that said, it is fact that marijuana increases the probability of one moving on to harder, more dangerous substances (https://www.drugabuse.gov/publications/marijuana/marijuana-gateway-drug). Also, specifically, the bad habits of which I was referring is mainly the daily recreational use of marijuana. Which, without a doubt, causes one to lose focus on the job or at the wheel. Obviously I'm not saying that everyone that uses marijuana uses it every day or that marijuana will make everyone a reckless driver or a worse employee. Hopefully you can see the point I'm making and realize that in no way am I attacking marijuana users. I simply hope you understand the point I am making in that marijuana can be a gateway drug, and in many cases, develops unhealthy habits.