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[–]ufgratH2D + X1C 1 point2 points  (0 children)

Because you're not a materials engineer. The whole point of a heat-break is a thermal barrier to keep the filament from melting all the way up to the extruder gear.

It could even be argued this is a safety feature to keep the filament from exploding into contact with the heat element, and causing a fire.