People with 120/130 IQs can afford to lose 10 points.

Unfortunately, most people who use drugs are not up in rarified air, at least not until they take a hit, in this department. A person with a 90 IQ who loses the average of eight IQ points is in real trouble in terms of having a job that pays the bills.

Link: https://www.cambridge.org/core/journals/psychological-medicine/article/abs/lsd-acutely-impairs-working-memory-executive-functions-and-cognitive-flexibility-but-not-riskbased-decisionmaking/99539D459AD226317A37F3E9960D3AC3