I limit my discussion to basically baccarat as I do not and will not play roulette.  Nothing wrong with it, i just don't play it. 

However, as I have play extensively around the USA at numerous casinos, I really do feel it is the pschy of the player, a skilled player that actaully causes his lost.

The streaks and the repeating, 'whatever' is extremely easy to make money on.  Wager $500.00 on the Banker and keep it there and press one time on the win you are riding for $1,000.00 for the 5 or 8 or 10 times the same side, Banker or if you were on Player came out.  And then you lose only the last one when it cuts.  So just say you won 8 and gave back the last one that lost.  So you won $7,000.00 and then a series of 1's, 2's and 3's came and the player's pschy directed him to to stay with the repeating style of wagering.  He could not control himself and was all hyped and motivated by the $7k win.  He gives half of it back and then the frustration sets in. 

Then he convinces himself he he should adapt to the shoe and switches to the cut or the short repeating style of wagering, etc.  He wins a few and then the shoe produces 2 longer streaks of both Bankers and Players.  The his real frustation sets in because  he knew he lost an easy $15k or so if he only did what he did with the 8 Bankers in the beginning. 

Then he switches back and the shoe switches the opposite way as well. 

That is the serious problem and what really does happen more often than not.

Then he waits and gets his thoughts back.  Then he starts to win with the cut style and the chop style of wagering a few here and there.  He is not satified with the few unit win as everyone states they do and gets rich off of.  (Which is pure B.S. because  99.9% of everyone can not and will not control themselves). 

There are numerous things to learn and abide to in a game that can produce anything at anytime and a game that will do it without mathametical reasoning.  The shoe will follow itself as well as not.  The shoe will produced everything from 20 of one of two sides to one of each side, side by side for another 20 times.  And, then the shoe will produc everything in between. 

Everyone here bascially says, just wager this or that and stick to it.  You will win so much a day.  You cannot do that everyday.  No matter what you want to say, it will and then it will not happen with any followed protocol you abide to with certain scheduled wagers.

The only way to constantly prevail at baccarat, is to wager with what the shoe is producing, if you win more than your buy in (for example) to switch over to some kind of money management system and play on the casino's money while you pocketed your buy-in and maybe 2/3rds of the win money, then attmepting to continue until you lose the 1/3rd, or whatever number percentage you work with.  But you win has to out number you lost buy-ins.  That is only accomplished with self control, complete knoweldge of what can and will happen, and expereince including losses within this game.  But for almost everyone, it is nearly impossible to walk away without getting back their loss when one occurs without further buy ins and play, and that is what sinks them.  Then you can be somewhat successful.

And, you can have thosuands of units as your bankroll as someone cites here all the time in plain generic responses.  You can wager the same thing every single day until you finally win a few units.  Then you can stop.  But the bankroll will be in the hundreds of thousands of dollars and your wagers will have to be pretty small to make it work with hundreds of units of draw downs.  LOL. 

What a tough way to make a living.  I could take that hundreds of thousand of dollars and make a great living in Haz-Mat spill clean up making tens of thosuands of dollars on small jobs and 6 figure profits on the larger jobs, where my profit to expenses ratio is around 70-80% profit. LOL.  LOL to the 100th power!!