Are we reaching the limits of human intelligence in terms of progress? We're by far the most capable animal when it comes to abstract thought and problem solving, but even then we're better at things that seem intuitive to us and don't require huge processing power. Quantum physics seems alien to us because it conflicts with the intuitive Newtonian model our brains work with. Modern math and physics are so abstract that most individual humans are simply incapable of understanding and advancing them. And we simply can't hold in our heads accurate models of large systems such as our own brains, and are forced to rely on oversimplifications. As an example of this, stuff like aging and even balding are things that seem like they should be solvable, but we just can't wrap our heads around them. We can't create a general AI, we just throw more of familiar algorithms at the problem. The problems that are still unsolved seem like ones that would require more processing power and creativity to solve than any singular human has, and chipping away at them one advance at a time as we've been doing for now might no longer work.

What I'm saying, is it possible that we've kind of hit a soft limit to how much the human brain can comprehend? Are the problems we're tackling becoming so hard that breakthroughs aren't possible without possessing a level of intelligence above ours?