In a sense a casino is a metaphor for life. We only pretend, lie to ourselves that we can "beat it," that we can control it when in fact, it's all half chances.
we can beat the casino if you have lots of capital that is much bigger on the house capital . some small time gamblers think that they beat the casino after they win but we cant control them because we dont own them . the casino owner are the only one that can controll the casino .
If your capital is much bigger than the house's value, then you are better off building your own casino, right? I see it like lottery, buying all the tickets would get you the prize but for much lower than all you spent to get it.
Granted there have been groups who have been beating blackjack before but that required a well-coordinated team, devices for card-counting, etc. It's not something an individual can do by himself.
I agree with your argument, it makes sense to buy a casino than playing with casino bankroll equivalent. Even the roulette cheating systems with magnet, lasers can be detected by casino administration with surveillance cameras. Beating the house edge is no possible for long run only hit and run strategy work for a short time period. House always wins.