Example battery: https://www.amazon.com/Lectron-Pro-7-4V-7600mAh-Battery/dp/B01AAVM1MS
I see many different RC batteries that are have very High "C" ratings but all of them use connectors rated for very low current. According to the formula the continuous current out of that battery would be 75C * 7600mAh = 570A. 570 A is way more than any deans connector is rated for.
Also the wire off of that battery looks like 12 gauge wire. From charts I find the gauge would have to be below 1 gauge to work effectively.
Is the "C" rating for RC batteries just much greater than it needs to be and they are in a sense selling a spec that really doesn't make any difference?