They'd still have to open 6M channels which would create the same number of transactions on the Bitcoin Blockchain
This doesn't seem factually accurate. Please support this claim with more information and preferably a citation. This isn't how LN works to my knowledge.
What I said is factually accurate. It's mentioned on the homepage of the lightning network website in the "How it Works" section. Why would you challenge my statement when you haven't even read the basic information?
Because you left out some information. These channels only have to be opened once, and at current prices this is around 40 cents. It costs a lot more to both open a bank account and send money from a -> b.
If you need to open up 6 million channels it will create approximately a month worth of transactions at the current rate and will significantly push up the transaction fee.