Hey, neat. Yet another comment where I am a demonstrable expert and I get voted to Hell like a moron. Feel free to get this one to -44, except that you can't tell any more where it lives. Best to down vote if you're unsure.
I downvoted dtby's comment because the reasonable way to deal with worthless comments is to downvote them, not post a followup saying "This comment is completely unhelpful."
In the absence of security countermeasures on the casino end, counting cards is not very difficult. You need to be able to do some mental arithmetic in a distraction-filled environment, and you need the self-discipline to follow the technique even when your guts are telling you otherwise, but lots of people have those character traits.
So if a casino does not take active measures to distinguish the blackjack players who are counting cards (who need to be kicked out) from the blackjack players who are just lucky (who need to be courted until their luck runs out), then lots of people, not just the generic “you”, will show up and gradually bleed the house dry.
In case anyone happens to continue to be confused: see, also: No true Scotsman.
You don't only get downvoted for being incorrect.
If it seemed like I care about getting down voted, I assure that's only ancillary.
I had no idea that was the point you were trying to make. But I still don't know the reasoning behind your claim - to me, it makes sense for casinos to spend money looking for and kicking out card counters.