Prusa 3D printers are open source. Their main product over the last several years has been the MK2 and MK3 line of printers. Millions of clones have been sold by well-equipped Chinese companies. The clones sell for 1/3 the price, but make some cost cutting measures to achieve low cost. The result is that there is plenty of room in the market for the first party company and the clones.
Your suggestion that we outlaw business is clearly meant to be inflammatory, but it's unnecessary. Businesses like Prusa seem to be just fine without using IP restrictions.
> Why would a dr want to work on a solution for cancer instead of just treating people if the value gain is the same?
I would put it to you that you've misunderstood why people do things that they do. I am making a 3D printable off road robot and associated computer vision stack completely open source because I want to. It feels good to make something I think others will benefit from. I am able to cover my material needs with part time work, and I put a huge amount of effort in to my computer vision research so I can help contribute to solving tough robotics problems. The endeavor has cost me thousands of dollars in supplies and truly hundreds of hours of my own time. But it's worth doing.
You mentioned a desire to "protect your work". Well your work is not under attack when someone observes what you've done and reproduces it. Your work is still there, it's fine. But to advocate for IP restrictions is to say that you think I should collaborate with you to stop anyone else from copying your work. And I think that's a bad idea. Closed source technology is a big unchanging black box that stops up the works. We can make the cost of living dramatically cheaper for all people on Earth, but not with thousands of little black boxes everywhere. Imagine a huge open source software project that relies on a bunch of closed source modules. Developing improvements would be a pain. Why should we tolerate the same for the very means of reproduction of our society?