Lots (if not all?) of hospitals offer free care options for patients in poverty. I grew up poor and had a family member who was able to be diagnosed, for free, a university clinic that offered free care, and then was able to receive free care through a program offered at one of top 5 ranked cancer systems in the US. Although the premium quality wasn't even that big of a deal. The overwhelming majority of care can be provided pretty much anywhere. It's not like a premium hospital offers super chemo or super radiation. The treatment is what it is, and all the money in the world isn't going to significantly change your odds of survival relative to basic treatment provided at any clinic anywhere.
The US healthcare system is broken beyond belief, and I do think there is some degree of managerial sociopathy around profit (particularly in the pharmaceutical and insurance wings), but by and large there still remain options for people even if they may be arduous, and I do think that hospitals and doctors are still significantly motivated just to provide good care.
The problem is that, for patients in poverty, the chance that cancer will be detected early enough for treatment is much, much lower. Cancer is often detected during check-ups for vague symptoms that most people can't afford to go visit a doctor for. By the time the symptoms become alarming or even debilitating it is often already too late.
The US healthcare system is broken beyond belief, and I do think there is some degree of managerial sociopathy around profit (particularly in the pharmaceutical and insurance wings), but by and large there still remain options for people even if they may be arduous, and I do think that hospitals and doctors are still significantly motivated just to provide good care.