The doctor can't prescribe me an escape from society, A way to eschew idiocy, redundancy and ignorance. So even though I'm not a doctor, No degrees, claims, nor title. I'm prescribing myself a substance. One of which I deem fit. So this is the reason, As to why I smoke, Cannabis.
To some people, I'm sure the use of drugs may be against their beliefs or morals. I dislike it as well as hypocritical as that may be. But, being with Cannabis(or Marijuana) I see it's only deemed wrong in the manner of which you use it. The same goes with certain other drugs such as Alcohol.