I think it was them miss understanding what you said and you miss understanding what they said.
I never said you don't know SHITE. I read all the way thru those posts and you are right. I also think they were right. If you read what was posted and not read in to it.
You need high Amperage to the Primary side of the coil, the more amps it can draw the more secondary voltage can be. Even if you feed the coil 9 volts DC with a 2 gauge wire, it will only draw so many amps and no more. But you can shoot your self in the foot by having corroded connectors, too small wires or a low voltage source.(Voltage drops)
So using my post about using 22 gauge wire VS using 14 gauge wire both at 9 V DC, which one will have a hotter spark? This is all about Amperage since the volts are the same.