That’s because amphetamines were a piss-poor solution. Meds like Mounjaro, which directly eliminate hunger hormonally in the brain instead of simply being a side-effect of brain overstimulation, seem like a significantly better option to me
Disclaimer: Been on Mounjaro for 1 month and have lost 15 pounds absolutely effortlessly and with zero side effects
That was the approach in the 50s and 60s with amphetamines as an appetite killer.
That didn't work out well.