You incorrectly assume each Pharma has control over their product availability. The FDA is in control, and the FDA has a long record of burying good products. The really big Pharma control the FDA.
Unfortunately, scientists have cures for many problems in mice. In 2008, there was a Canadian study which found the following:
Diabetic mice became healthy virtually overnight after researchers injected a substance to counteract the effect of malfunctioning pain neurons in the pancreas. "I couldn't believe it," said Dr. Michael Salter, a pain expert at the Hospital for Sick Children and one of the scientists. "Mice with diabetes suddenly didn't have diabetes any more."
They injected the neuropeptide "substance P" in the pancreases of diabetic mice, a demanding task given the tiny size of the rodent organs. The results were dramatic. The islet inflammation cleared up and the diabetes was gone. Some have remained in that state for as long as four months, with just one injection.
I agree, the FDA moves too slowly. But on the other hand, they have cured about every disease known to man in mice and rat models. Those same treatments frequently are ineffective when tried on humans.