Antipsychotics do not always cure "voices", far from it! My uncle takes an incredible dose of Haldol evryday and still hallucinates like crazy, even (much) more than when he started his treatment, about 20 years ago.
Doctors these days, (in France for the least) tend to be very copious with charging someone with schizophrenia, or committing to starting a treatment of antipsychotica, especially since most professional doctors are more and more turning to the private side of things and that the hospitals are left with wing-nuts not being able to tell their left from their right, abusing the system and going for the money a hospitalization brings in (around 40k a month per patient in France), just to keep these mental institutions running at a bigger scale than needed, as it is payed by the insurance, which won't last long if this keeps going as it does. And as it is now proscribed by the big pharma, (you read that right) psychiatrists prefer to administer injection in the form of palmoate instead of administering oral pills for antipsychotic use as a treatment, and as an exampel, for risperidone, it takes up to 3 months of hospitalization to only just "prepare" the course of injectable treatment! Horridious!
Most schizophrenics don't get cured by dopaminergic antagonists, they are maintained in their pitiful condition of sickness.
Meditation, openness , family, love, and in my experience , forced awakened states of mindfullness trough drug use and social action taking and understanding of ones surroundings (trough therapeutic help or not) are ways to make one surpass its state of mind and learn to live as an adult in society (in my case, I do my best, like everyone else).
I do believe antipsychotics can be usefull in some situations, they've saved my ass quite a few times when my environment wasn't putting up with my overexcited state anymore, but then just as a last resort and to get me to sleep as that was the only downer I had! You have to remind that haliperidol for example fucks with the heart rythm maintaining vectors and can cause a cardiac arrest when combined with high doses stimulants, by exacerbating it!
All that to say that I believe there are better ways, especially in the 21st century, to treat someones delusional state than by using haloperidol. Most people still encouraging this use have learned that from people studying in the 70s 80s, from professors who learned that from scientists who observed in the years 50 that when a rat was given 10mg/kg PCP and then administered Haldol it didn't squeak and move as much anymore in its little box..
