By smoking bud you are breaking the laws..
That is easily the most bizarre argument against the legalization of Cannabis I have ever heard.
You're assuming that the legalization of Cannabis would result in everyone in the world smoking it regularly which quite frankly is absurd.
You're then also assuming that big companies would be the only people producing Cannabis on a mass scale if it was legalized which is again absurd.
And then your claiming companies would start adding addictive agents to the Cannabis which is even more absurd.
And the 2nd part of your post smacks of prohibition propaganda. "you'll smoke a joint which will lead you down a bad road, then you'll smoke crack and end up in jail where you will get butt fucked by a big black man named Tyrone."
It's not only Cannabis that should be legalized, it should be all drugs, to an extent. If I want to smoke a joint, or take a line of Cocaine that should be my choice, not the choice of some nanny government that thinks I as an adult don't know how to take care of myself.
If politicians were not so fucking scared of the scaremongering media drugs like cannabis, lsd and ecstasy (mdma) would be legal already.