Tell me where I was wrong
People will develop a psychological dependence to nearly anything. It just so happens that weed also gives feelings of pleasure so it will be a candidate for addiction by certain individuals.
Psychological addiction: Individual depends on it, not necessarily a physical addiction but it can be
Physical addiction: The body craves it strongly, might go into withdrawal without it (Example: Nicotine in cigarettes)
I never said weed must be physically addictive, as a lot of smokers of it tend to claim that it is not physically addictive.
If it does somehow get legalized, businesses will have to be careful in regulation of their employees, considering the effects of weed tend to stay around for a while, and is somewhat similar to alcohol in it's effects. Also, weed should be prohibited from any place that bans alcohol or tobacco smoking.
Still, a good amount of people in the population will depend on it, and develop a psychological addiction to it, if not physical.
1. The effects of weed aren't at all similar to the effects of alcohol. You coordination is still there, along with everything else. So performance at work shouldn't be affected. The reasons for alcohol and tobacco being banned at places is because they cause harm to others. For instance, Second-hand smoking from cigarettes, and people who can't handle their alcohol(Being violent, a nuisance, etc). There's nothing damaging from being around pot, and the user will never react in a harmful or irritating way, so why ban it?
2. While it can be a habit, the psychological addiction is nothing. People will always find it attractive because they find it comfortable. For comparison, think of that being at home feeling. It's strange to be away from it after you've been there for so long, but you learn to live without it. Same goes for weed, the "addiction" isn't harmful, and you don't depend on it. You're not thinking "How am I going to through this situation without being high", you're thinking "Imagine how awesome this situation would be if I was high".