No you are wrong. You didn't read the wiki at all and you don't fully understand WHY it's called Card Advantage.
On the same
wiki page, under Forms of Card Advantage.
Read the section on Sweeper spells. Where it says you GAIN Card Advantage by using a Board Clear to kill enemeis.
Read the section on Combat where it talks about favorable trading. By using your 1 minion to kill 2 minions you gain Card Advantage.
I'm sorry, but you are completely wrong and Card Advantage is not a measure of cards drawn.