i definitely agree with what you say... no matter how fun drugs are there is always a bad side to them - comedowns, addiction, etc... there's no bad side effects to organic activities - skiing, lifting or studying. when i lose focus of the important things the occasional psychedelic drug always gets be back on the right track.
if you have to ask whether or not it's a good idea to try a particular drug, stay away from that drug. you're obviously not ready for it/never will be. also, opiates are a horrible idea.