You can flip this, and look like the bright side: all that huge complexity means lots of things to discover. Nobel prize winner Frank Wilczek writes in his last

You can flip this, and look like the bright side: all that huge complexity means lots of things to discover. Nobel prize winner Frank Wilczek writes in his last book "Fundamentals" that learning physics is like being born again. Kids have a lot of fun playing with water when they are around 3-5. Fluid dynamics is complex, and it takes our brains a long time to observe and get an intuition of it. All that observation, experimentation, (subconscious) hypothesis formulation, testing, adjustment, retesting is a rewarding experience. After we are about 7, we pretty much finish understanding the world around us. Leaves fall from trees, but not straight, sometimes they go this way and that because of the wind -> all this would have produce a sense of wonder in someone who's only 3 years old, but when you are 7 it's just old news. We switch to learning about the human world, via school. Sometimes it's fun, sometimes not, but whatever. But when you encounter quantum mechanics, or special relativity, or generalized relativity, or any number of topics in Physics, your intuition fails you big time. You need to go through a new learning process, just like when you were 3 years old. And that's a tremendous lot of fun. Now, here's the sad part: a person like Frank Wilczek probably knows everything about physics. All the ins and outs of all the physical theories out there, quantum field theory, quantum chromodynamics (he's basically one of its inventors), general relativity, you name it. For him the number of times he can experience the euphoria of such an intellectual rebirth dwindles by the day. But who knows, maybe that's what it looks like from our vantage point, maybe the world at the frontiers of knowledge is still full of wonders for Frank.