You're justifying alcohol because it gets out of your system fast? Wow...so shit...Crystal Meth gets out of your system in a few days, so that'd be like a top-choice drug if I was going to do drugs right? Or even coke gets out about as fast...shit. I'd be much better off doing Meth or Coke before I smoked Weed, thats for sure! That shit stays in your system for two-weeks MINIMUM! Damn that shit fucks you up...that's one long ass high!
Look, it's not about how long the drug stays in your system. Its about what the drug does, how it affects your body, how it affects your mind, and what kind of high it gives you. From personal experience, as well as countless observations - Weed is a much better "drug" than alcohol or anything out there. Healthier, more fulfilling, less-harmful, and not a complete waste of time.