> The danger is simply that you will like it, you'll end up using it every day, all different times of the day, and it won't really hurt your health as much as it will make you live your life in a somewhat dopey, detached, less-intelligent way. As time goes on it won't feel "fun" it'll just feel "normal". And you just won't get as much out of your life as you could get, won't achieve as much relationship success, professional success, or personal fulfillment.
As a general rule, I don't disagree, although there could be other important variables in place here as well.
An alternative outcome is that one spends their time thinking about intelligent and important things (that few other people think about), except they may not have an easy route to monetization (professional success) for various reasons that are not the fault of drugs, and in some cases arguably due to a lack of more widespread drug usage, or simple diversity in thinking and discussion.