Of course it will
Just at a pace that allows the drawing of profit from each stage of progress. Its the way the world is set up and human nature. You can't change it.
Making a profit is fine. But corruption is bad.
Stockholders concentrate on the short term. But unfortunately the (undesired) effects of a drug take years and years to get known (to the public and prescribers).
Users and stockholders are often two seperate groups. It won't be the first time when people profit from other peoples misery, even when those making the profit are well aware of the devastating effects of the drug/treatment - they're not the ones suffering.
Well known drugs, with a good reputation, that have been used for years but that are no longer patented are being pushed out of the market because companies can make bigger profits with new, patented, unknown drugs with unknown side-effects; doctors are manipulated to prescribe the new drugs.
Research is focused on products that enables companies to make a profit. But it is also very helpful to know what does not work and why. Also, some products can't be patented, so they are not getting the attention they deserve when focussing on health promotion.
Research is focussed on troubles that affect the (physiological and mental) health or (potential) problems of the rich part of the world population, and/or on diseases that affect many patients.
Serving the poor or the rare would mean red figures for the industry so those groups are on their own.
Note. Often drugs do not cure. Many drugs merely lessen the symptoms, the harmful outcome - they do not deal with the core of the problem, the thing that's causing trouble.
Making profit is the way the world is set up, I agree. But regulation is needed to get rid of excesses.