You can't simply assert that. There is nothing to stop companies making drugs and foregoing patents right now. Feel free to point me to them - otherwise lets limit ourselves to the real world.
I can't tell whether or not you're joking. In the real world, people doing business as government threaten everyone who doesn't respect their monopoly constructs (patents and regulations).
You have put forward nothing more than an opinion that pharmaceutical development requires patents, and it is an opinion that at least one person with professional experience in the field explicitly rebuts.