That's not quite what he said. The motor has a lower resistance than the heatsink. The ESC (hopefully) has infinite resistance from the + and - power inputs.
Despite all that, I still don't like the idea of the heatsink even partially shorting the battery TBH.
Same here that's why I still installed heatshrink on the bullets.
Castle Neu 1520 on 6S LiPo Powered Gmaxx (Nitro Killer)
Predator with OS .21TM
Supermaxx with Mach .26
Revo with OS .18TZ
Kyosho ST-RR Conversion
Ofna CR with Tekin ESC/Motor (2)