500A through 15A wiring? 15A fused circuit? - How long do you think the fuse would last? Hardly long enough to get the wire warm. Add to that the fact that most vehicles today, with switched lighter/aux power sockets, disconnect them when cranking.
Speaking of Hondas, if you disconnect one side of the battery on newer models when jumping to another battery, as proposed earlier, your radio is disabled until you reload the security passcode.
I’ve seen mention of surges when connecting another battery for a jump. Don’t think so. Most of the power will be going into the battery, thus it will act as a surge suppressor. The business about blowing out ECUs/ECMs during a jump has been hyped by dealers frequently to cover their asses for failed equipment. Of course, if you’re stupid enough to hook up jumper cables wrong, you deserve what you get.