Since you asked, that was the simple and polite way to say you were just splitting hairs and being argumentative. It is very much the same as if we are hanging out at your house and order pizza, and I gave you two $5 bills to pay for the pizza. Then when the delivery guy shows up, you instead get a $10 bill out of your wallet and then argue with me that I didn't pay for it because it wasn't the exact same bills.
I said "draw energy through your wall connection". Sure, it's a pass-through process that goes through other components. No one was trying to claim that there is a direct wiring jumper from the port to the heater, because the heater obviously doesn't run on 240V AC electricity, so your arguing with me and trying to correct me on that deserved a disagree marker and wouldn't have needed further explanation except for your asking.