Yes, the casino won't care if the winnings are always on your side and during the game you still have small losses and have more wins.
But if you continue to win every game and never lose, chances are the casino will act and be investigated with suspicion and there will be follow-up that could hurt you because every casino has rules.
for whatever reason the house will always win and reign.
In my opinion, there is a certain amount where casinos will take action against someone winning. I mean, why would they be alarmed when someone is on a winning streak when the win does not exceed 4-digits. If the rules can hurt the player then they would not be playing there at all, pretty funny that everyone here thinks that casino rules are against the players when in reality there are only few rules needed. And casino does not always win, if you search in Google right now about people winning a lot in casinos, I think your point will be busted.
If you win the jackpot then that is the time the casinos will lose but for sure they can bring it back easily by making a losing streak with the other players.
Card counting is very risky, and even if your winning streak is just a small amount of money as long as its on the Blackjack, you can still be on the watch list and might be put on hold until they prove something against you. Besides, the card counting is not easy at all and I'm not good with numbers so I wont try this one as well.