Maximum Current of TO220 Package

https://electronics.stackexchange.com/questions/108538/practical-current-limit-for-to-220-package

Essentially - needs 170W dissipation to remain at 25C, so the 67A rating is ludicrous under normal conditions unless heavy heatsinking is applied.

In another way - think about the small leads. If wire of that gauge is not rated for so much current, why are we rating the transistors that high?