Small percentage of gamblers win a lottery jackpot as well and live with that money rest of their lives. This doesn't make lottery a viable strategy.

I feel that maybe poker as a gambling is one way to make a viable career, but it's not for everyone, no matter how skilled you are. Because to win with poker, you need a worse players then you are to be a winner, and often they have to be unlucky too.

If there would be a viable strategy to win, it wouldn't be called gambling, and there would be no casinos hosting that game. The whole idea of casinos is to make profit, and if there would be a way to beat the casino on their game in a long run, why would they allow it? It would be just bad business.