It might, if they’re addicted to it, “need” money for their next score AND are under the effects of a drug which is notorious for making one lose one’s inhibitions and making one more irritable and selfish
Then they aren't really doing it for fun then are they! They are addicts and the whole point of the thread is that most people aren't addicts.
Honestly, you lot have no idea how many perfectly normal, professional, family orientated, successful people took drugs regularly and had a wicked time when younger, or still take drugs and enjoy it.
Teachers, police, dentist, doctors, accountants, bankers, admin workers, charity workers, yoga teachers, solicitors, coders, entrepreneurs, fashion... so many people.
Don't think you can spot these people unless you are out with them! There is no way you will know that your divorce lawyer took coke last friday, or your kids teacher takes herself off to Ibiza in the summer and gets off her tits on pills.
My MDMA (and numerous other drug) days were amazing. Loved it. But you know, life moves on, you get more tired. Work ramps up. Other things take priority. Still got a fab group of friends from that time of my life. None have MH issues which is frankly amazing given the prevalence of MH issues in society in general. None have "a serious intellectual deficiency". Many are in extremely privileged positions at work and most have a very high achieving personality and have amazing lives. Fit, healthy, wealthy with good relationships and boundaries.
Drug taking isn't for everyone that is for sure, but for a very many ordinary people its been/it is a positive addition to their life.