Because online is a business plain and simple. The quicker they get people out the quicker they buy into something else.. Theres no way a computer can make the cards random. Especially when they are using anywhere from 35 to 100 decks in a hand. After every card is dealt a new deck is used. just read the RNG fact page or have the site send you it. If only the decent players won all the hands then donks wouldnt be playing. They have to keep donks around one way or another.