Poker is players taking money from players. The house gets the rake whether cheating is involved. They are so worried about people cheating black jack and rig

Poker is players taking money from players. The house gets the rake whether cheating is involved. They are so worried about people cheating black jack and rigging machines I doubt they really spend a whole lot of attention if Customer A just robbed Customer B when the house gets their cut either way. There is not much ROI for them to care unless the cheaters are so active they run off customers.