Does this mean that we have to traverse a 4000 degree “fluff” zone on our way out of the solar system? That appears like this is an impenetrable zone that keeps man trapped inside the solar system.
No, it just means that we just enter and exit the system through the sun’s ‘wake’ or come up with a subspace drive that bypasses it entirely. Same reason you don’t jump off the front of a moving boat when diving.