There absolutely is. You can't effectively spend bitcoin, except on the exchanges. You can't use bitcoin to buy anything. The only thing you can do is use USD to buy bitcoin and transfer the bitcoin, and have it transferred back into USD by the merchant.
When you exaggerate points like this you undermined the reasonable advice you're trying to give people.
Product and service availability for Bitcoin is very small, indeed, but it's not zero and the point you're trying to make is probably lost on anyone who already knows that you are either exaggerating or confused.
