There is a big health cost. Not sleeping causes premature aging. Stimulants also have negative cardiovascular impacts, can cause psychosis, seem to affect the personality long term, and a lot more.
The issue with living in a society where money so closely correlates with health is that anything bad for your money tends to also be bad for health.
You're pretty close to whataboutism here...
I suppose we could all shrug and go "everything does everything" and get lost in over-generalization, but that doesn't lead to any sort of productive conversational outcome.
I dont mean that in the "everything causes cancer" big unknown sense. I mean that in quantifiable sense that allows you to weigh net benefits.
Eg, prolonged stress is bad for your cardiovascular system and lowers life expectancy by quantifiable amounts. Lack of money causes prolonged stress. So if a stimulant is what allows you to be productive enough to have ample money, you're arguably better off, because of that and the multitude of other health benefits from having money.