School me on thesis'es /sci/, as one who did not go to college or grad school. If there are millions of people writing thesis'es, doesn't that take learning original ideas and new knowledge? Shouldn't we be super advanced by now? Or are all these thesises being written garbage, or what?

I keep seeing these academics and look at their papers, full of terminology that make no sense to me. Is knowledge advancing as fast as it seems or is academia total bullshit?