Substance abuse can affect the accuracy of your trading decisions, so I feel people interested in trading need to understand this risk before starting to trade so that they do not turn to substance abusers, but rather focus on the healthy alternatives.
If you know those substances you mentioned can cause a trader to take irrational decision because they are intoxicated or inebriated , so why alluding that it is part of what traders will eventually turn into? This is not true.
A trader who takes substance like alcohol, Energy drinks and Caffeine, Cigarettes, Cannabis and even cocaine
. etc
(like you said) is not doing that because he is trading. No. Such kind of behaviour is a personal habit and not because a trader must have to do that.
In fact, trading is a serious business that you have to be free of drugs so as to get a sound mind to take your decision because one wrong click can blow out your account and the substance gets cleared off your eyes in regret. No one wants to make such mistake because he took substance. However, if you find joy in them and your trade is fine then by all means do what makes you happy because happiness helps you to take favourable decisions. It is a personal decision what you take and how you live your life.