There is no doubt too many older patients are placed on these meds. Often, older patients with dementia get aggressive and these meds calm them down. Makes the nursing home more tolerable for other residents and staff. One trouble is the cost though most will be going generic soon or already are.
There are calmative drugs which don’t heap on a lot of side effects, but they aren’t “antipsychotics” either and so probably get ignored.
Once they are generic the profit motive will be gone. Therefor use will most likely decline.