The thing is the energy density, flow rate/volume, and heat flux in a raptor is just so extreme. For example, there's two turbopumps operating at around 100k HP

The thing is the energy density, flow rate/volume, and heat flux in a raptor is just so extreme. For example, there's two turbopumps operating at around 100k HP each in a volume not much bigger than the propane tank on your grill.. and those are basically just fuel pumps, not even where the real party is (pre-burners and combustion). Anything not going according to plan like a very small piece of debris in a filter causing turbulence or a change in flow rate is almost always catastrophic.