It’s more likely that the capitalist would just try to rip the inventor off and take full credit for the innovation and out-compete the inventor (unless it was incredibly unique and patented very carefully/licensed to a megacorp).

You basically need to be an expert in patent law to be able to bring a product to market. Even then, it still doesn’t prevent copycats from also coming to market and completely obliterating you. You need to engage in lawfare to stop them - a patent is only as good as your ability to enforce it.

Of course, not every innovative product needs to be brought to market for others to enjoy in its unadulterated form and you certainly don’t need to profit from or receive credit for your innovations to innovate (which is the point of the meme). Open-source or 3D-printed technology is a net positive for humanity if people have interest to make it themselves or learn from it.