If some of the gamblers are here only for fun and entertainment that means, this type of gambler is willing to take risk and can afford to lose, it doesn't matter for if He win or lose. But if you are here in the gambling to earn a lot, you need to have a good plan or strategy to beat the beat the house edge something like that based on my experienced.
Taking down the house is harder than that. Plan and strategy might not be enough, you should also have that skills amd knowledge that you will need. Also, they have these strategies too for those people that is having a great profit. Another thing is that you will never be able to do that in a day unless you're betting millions which don't ensure your win every bet.