In the re-entry post by Andrew Garrison, he says that anybody who would be in the capsule at Mach 40 will be instantly squished and said after that it’s good no astronauts are in the game yet
“G-forces from the deceleration (which I did not measure) would undoubtedly turn any person into a pancake of squishy. So, while I am way hotter than Apollo 11, my astronauts would be far more deader. It's a good thing we don't have any astronauts in SR2 yet.”
If you haven’t caught on yet, note he says “yet”.