This is probably one of the top 5 most retarded rambles I've ever read. You're quoting someone speaking on a topic from experience..trying to help others avoid the dangerous path he went down. How did he fail? He's sitting there telling you he's 15 years clean. What would a successful meth user be to you?
Your ignorance angers me.
My.... ignorance angers you? what ignorance is that? it is ONE sort of "experience", experience does not trump all other methods of garnering knowlege. He is telling HIS story, a story that is, as we just agreed - HIS.
Now, imagine an electician who zapps himself while in the process of working his profession. Does he say "don't ever ever mess with electricity"? No, he doesn't. if someone fails at something their advice to all others to never ever touch that with which he failed, we are led to believe that all other people are just like this guy, that there is no difference, no allowance for anything but utter failure. "if you do A - as I did, then the results will be B, as mine were" is a faulty premise.
in answer to your question, he failed because he got trapped by a very vicious substance, one that few mange to come away from uscathed but the poster is being presumptuous in saying what will happen to others if they do as he did.
What would you say to me if I said that I freaked out on pot twice, i had to go to the hospital and I am now 10 years sober from marijuana? you would say - good for you buddy, keep it up, too bad that happened to you.
Now what would you say if I said "yeah, I had to go to the hospital so, boys and girls never ever ever under any circumstances use marijuana". It is this difference with which I take issue.
For your information - I as well am a failure when it comes to mehtamphetamine, I did not sucessfully keep it under control and wound up voluntarily going to a rehab program but the story is my own. I might tell it as a mater of interest, or as an example of what not to do but I will not, nor should you, claim that no one should ever use a substance because, why, look what happened to me.
One who derives an entire opinion on the extent of another's knowledge based upon a single post- a post that "angers him", might consider the definition of ignorance.